86857617 has 32 divisors (see below), whose sum is σ = 146856960. Its totient is φ = 44349120.

The previous prime is 86857609. The next prime is 86857633. The reversal of 86857617 is 71675868.

It is not a de Polignac number, because 86857617 - 2³ = 86857609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86857657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10443 + ... + 16815.

It is an arithmetic number, because the mean of its divisors is an integer number (4589280).

Almost surely, 2^86857617 is an apocalyptic number.

It is an amenable number.

86857617 is a deficient number, since it is larger than the sum of its proper divisors (59999343).

86857617 is a wasteful number, since it uses less digits than its factorization.

86857617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453.

The product of its digits is 564480, while the sum is 48.

The square root of 86857617 is about 9319.7433977551. The cubic root of 86857617 is about 442.8629038000.

It can be divided in two parts, 868 and 57617, that added together give a palindrome (58485).

The spelling of 86857617 in words is "eighty-six million, eight hundred fifty-seven thousand, six hundred seventeen".