72744659 has 4 divisors (see below), whose sum is σ = 78340416. Its totient is φ = 67148904.

The previous prime is 72744641. The next prime is 72744709. The reversal of 72744659 is 95644727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95644727 = 19 ⋅5033933.

It is a cyclic number.

It is not a de Polignac number, because 72744659 - 2⁸ = 72744403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72744359) 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, 2797859 + ... + 2797884.

It is an arithmetic number, because the mean of its divisors is an integer number (19585104).

Almost surely, 2^72744659 is an apocalyptic number.

72744659 is a deficient number, since it is larger than the sum of its proper divisors (5595757).

72744659 is a wasteful number, since it uses less digits than its factorization.

72744659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5595756.

The product of its digits is 423360, while the sum is 44.

The square root of 72744659 is about 8529.0479539044. The cubic root of 72744659 is about 417.4460642433.

The spelling of 72744659 in words is "seventy-two million, seven hundred forty-four thousand, six hundred fifty-nine".