72008729 has 8 divisors (see below), whose sum is σ = 78063552. Its totient is φ = 66027600.

The previous prime is 72008701. The next prime is 72008759. The reversal of 72008729 is 92780027.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72008729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72008759) 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, 16379 + ... + 20304.

It is an arithmetic number, because the mean of its divisors is an integer number (9757944).

Almost surely, 2^72008729 is an apocalyptic number.

It is an amenable number.

72008729 is a deficient number, since it is larger than the sum of its proper divisors (6054823).

72008729 is a wasteful number, since it uses less digits than its factorization.

72008729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36847.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 72008729 is about 8485.7957199075. The cubic root of 72008729 is about 416.0335760159.

The spelling of 72008729 in words is "seventy-two million, eight thousand, seven hundred twenty-nine".