732736621 has 4 divisors (see below), whose sum is σ = 732794044. Its totient is φ = 732679200.

The previous prime is 732736597. The next prime is 732736639. The reversal of 732736621 is 126637237.

732736621 is a nontrivial binomial coefficient, being equal to C(38282, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 593166025 + 139570596 = 24355^2 + 11814^2 .

It is a 3-Lehmer number, since φ(732736621) divides (732736621-1)³.

It is a cyclic number.

It is not a de Polignac number, because 732736621 - 2¹³ = 732728429 is a prime.

It is a deceptive number, since it divides R_732736620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (732736661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 38281.

It is an arithmetic number, because the mean of its divisors is an integer number (183198511).

It is a Poulet number, since it divides 2^732736620-1.

Almost surely, 2^732736621 is an apocalyptic number.

732736621 is the 38281-st triangular number and also the 19141-st hexagonal number.

732736621 is the 12761-st centered nonagonal number.

It is an amenable number.

732736621 is a deficient number, since it is larger than the sum of its proper divisors (57423).

732736621 is a wasteful number, since it uses less digits than its factorization.

732736621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57422.

The product of its digits is 63504, while the sum is 37.

The square root of 732736621 is about 27069.1082416839. The cubic root of 732736621 is about 901.5350843112.

The spelling of 732736621 in words is "seven hundred thirty-two million, seven hundred thirty-six thousand, six hundred twenty-one".