86957251 has 4 divisors (see below), whose sum is σ = 87174504. Its totient is φ = 86740000.

The previous prime is 86957249. The next prime is 86957279. The reversal of 86957251 is 15275968.

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

It is a cyclic number.

It is not a de Polignac number, because 86957251 - 2¹ = 86957249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86957198 and 86957207.

It is not an unprimeable number, because it can be changed into a prime (86957291) 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, 108025 + ... + 108826.

It is an arithmetic number, because the mean of its divisors is an integer number (21793626).

Almost surely, 2^86957251 is an apocalyptic number.

86957251 is a deficient number, since it is larger than the sum of its proper divisors (217253).

86957251 is a wasteful number, since it uses less digits than its factorization.

86957251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217252.

The product of its digits is 151200, while the sum is 43.

The square root of 86957251 is about 9325.0871845790. The cubic root of 86957251 is about 443.0321744725.

The spelling of 86957251 in words is "eighty-six million, nine hundred fifty-seven thousand, two hundred fifty-one".