72086705 has 16 divisors (see below), whose sum is σ = 88957440. Its totient is φ = 56047488.

The previous prime is 72086699. The next prime is 72086743. The reversal of 72086705 is 50768027.

It is a cyclic number.

It is not a de Polignac number, because 72086705 - 2²⁰ = 71038129 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49376 + ... + 50814.

It is an arithmetic number, because the mean of its divisors is an integer number (5559840).

Almost surely, 2^72086705 is an apocalyptic number.

It is an amenable number.

72086705 is a deficient number, since it is larger than the sum of its proper divisors (16870735).

72086705 is a wasteful number, since it uses less digits than its factorization.

72086705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 72086705 is about 8490.3889781329. The cubic root of 72086705 is about 416.1836917587.

The spelling of 72086705 in words is "seventy-two million, eighty-six thousand, seven hundred five".