86725791 has 6 divisors (see below), whose sum is σ = 125270600. Its totient is φ = 57817188.

The previous prime is 86725777. The next prime is 86725813. The reversal of 86725791 is 19752768.

86725791 is a `hidden beast` number, since 8 + 6 + 72 + 579 + 1 = 666.

It is not a de Polignac number, because 86725791 - 2¹⁵ = 86693023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86725091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4818091 + ... + 4818108.

Almost surely, 2^86725791 is an apocalyptic number.

86725791 is a deficient number, since it is larger than the sum of its proper divisors (38544809).

86725791 is a wasteful number, since it uses less digits than its factorization.

86725791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9636205 (or 9636202 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 86725791 is about 9312.6683072039. The cubic root of 86725791 is about 442.6387422835.

The spelling of 86725791 in words is "eighty-six million, seven hundred twenty-five thousand, seven hundred ninety-one".