72711705 has 16 divisors (see below), whose sum is σ = 126915264. Its totient is φ = 35254080.

The previous prime is 72711701. The next prime is 72711713. The reversal of 72711705 is 50711727.

It is not a de Polignac number, because 72711705 - 2² = 72711701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72711701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220174 + ... + 220503.

It is an arithmetic number, because the mean of its divisors is an integer number (7932204).

Almost surely, 2^72711705 is an apocalyptic number.

It is an amenable number.

72711705 is a deficient number, since it is larger than the sum of its proper divisors (54203559).

72711705 is a wasteful number, since it uses less digits than its factorization.

72711705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440696.

The product of its (nonzero) digits is 3430, while the sum is 30.

The square root of 72711705 is about 8527.1158664580. The cubic root of 72711705 is about 417.3830190861.

The spelling of 72711705 in words is "seventy-two million, seven hundred eleven thousand, seven hundred five".