86725517 has 4 divisors (see below), whose sum is σ = 91827036. Its totient is φ = 81624000.

The previous prime is 86725511. The next prime is 86725553. The reversal of 86725517 is 71552768.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74200996 + 12524521 = 8614^2 + 3539^2 .

It is a cyclic number.

It is not a de Polignac number, because 86725517 - 2¹⁶ = 86659981 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 (86725511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550734 + ... + 2550767.

It is an arithmetic number, because the mean of its divisors is an integer number (22956759).

Almost surely, 2^86725517 is an apocalyptic number.

It is an amenable number.

86725517 is a deficient number, since it is larger than the sum of its proper divisors (5101519).

86725517 is a wasteful number, since it uses less digits than its factorization.

86725517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101518.

The product of its digits is 117600, while the sum is 41.

The square root of 86725517 is about 9312.6535960488. The cubic root of 86725517 is about 442.6382761278.

The spelling of 86725517 in words is "eighty-six million, seven hundred twenty-five thousand, five hundred seventeen".