86957217 has 6 divisors (see below), whose sum is σ = 125604882. Its totient is φ = 57971472.

The previous prime is 86957203. The next prime is 86957249. The reversal of 86957217 is 71275968.

86957217 is a `hidden beast` number, since 8 + 69 + 572 + 17 = 666.

It can be written as a sum of positive squares in only one way, i.e., 86881041 + 76176 = 9321^2 + 276^2 .

It is a de Polignac number, because none of the positive numbers 2^k-86957217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86957317) 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, 4830948 + ... + 4830965.

It is an arithmetic number, because the mean of its divisors is an integer number (20934147).

Almost surely, 2^86957217 is an apocalyptic number.

It is an amenable number.

86957217 is a deficient number, since it is larger than the sum of its proper divisors (38647665).

86957217 is a wasteful number, since it uses less digits than its factorization.

86957217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9661919 (or 9661916 counting only the distinct ones).

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

The square root of 86957217 is about 9325.0853615396. The cubic root of 86957217 is about 443.0321167312.

The spelling of 86957217 in words is "eighty-six million, nine hundred fifty-seven thousand, two hundred seventeen".