72913729 has 8 divisors (see below), whose sum is σ = 83939328. Its totient is φ = 62040480.

The previous prime is 72913721. The next prime is 72913733. The reversal of 72913729 is 92731927.

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 72913729 - 2³ = 72913721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72913691 and 72913700.

It is not an unprimeable number, because it can be changed into a prime (72913721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37057 + ... + 38974.

It is an arithmetic number, because the mean of its divisors is an integer number (10492416).

Almost surely, 2^72913729 is an apocalyptic number.

It is an amenable number.

72913729 is a deficient number, since it is larger than the sum of its proper divisors (11025599).

72913729 is a wasteful number, since it uses less digits than its factorization.

72913729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76175.

The product of its digits is 47628, while the sum is 40.

The square root of 72913729 is about 8538.9536244203. The cubic root of 72913729 is about 417.7692174009.

The spelling of 72913729 in words is "seventy-two million, nine hundred thirteen thousand, seven hundred twenty-nine".