72717771 has 8 divisors (see below), whose sum is σ = 110808064. Its totient is φ = 41553000.

The previous prime is 72717767. The next prime is 72717781. The reversal of 72717771 is 17771727.

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

It is not a de Polignac number, because 72717771 - 2² = 72717767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72717751) 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, 1731355 + ... + 1731396.

It is an arithmetic number, because the mean of its divisors is an integer number (13851008).

Almost surely, 2^72717771 is an apocalyptic number.

72717771 is a deficient number, since it is larger than the sum of its proper divisors (38090293).

72717771 is a wasteful number, since it uses less digits than its factorization.

72717771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462761.

The product of its digits is 33614, while the sum is 39.

The square root of 72717771 is about 8527.4715478857. The cubic root of 72717771 is about 417.3946255392.

The spelling of 72717771 in words is "seventy-two million, seven hundred seventeen thousand, seven hundred seventy-one".