73689631 has 8 divisors (see below), whose sum is σ = 77948640. Its totient is φ = 69518592.

The previous prime is 73689613. The next prime is 73689653. The reversal of 73689631 is 13698637.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73689631 - 2¹⁹ = 73165343 is a prime.

It is a super-2 number, since 2×73689631² = 10860323433832322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73689601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20266 + ... + 23623.

It is an arithmetic number, because the mean of its divisors is an integer number (9743580).

Almost surely, 2^73689631 is an apocalyptic number.

73689631 is a deficient number, since it is larger than the sum of its proper divisors (4259009).

73689631 is a wasteful number, since it uses less digits than its factorization.

73689631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43985.

The product of its digits is 163296, while the sum is 43.

The square root of 73689631 is about 8584.2664800203. The cubic root of 73689631 is about 419.2458708490.

The spelling of 73689631 in words is "seventy-three million, six hundred eighty-nine thousand, six hundred thirty-one".