86891131 has 8 divisors (see below), whose sum is σ = 92307600. Its totient is φ = 81508608.

The previous prime is 86891117. The next prime is 86891143. The reversal of 86891131 is 13119868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-86891131 is a prime.

It is a super-2 number, since 2×86891131² = 15100137292918322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86892131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3106 + ... + 13543.

It is an arithmetic number, because the mean of its divisors is an integer number (11538450).

Almost surely, 2^86891131 is an apocalyptic number.

86891131 is a deficient number, since it is larger than the sum of its proper divisors (5416469).

86891131 is a wasteful number, since it uses less digits than its factorization.

86891131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16973.

The product of its digits is 10368, while the sum is 37.

The square root of 86891131 is about 9321.5412352250. The cubic root of 86891131 is about 442.9198560065.

The spelling of 86891131 in words is "eighty-six million, eight hundred ninety-one thousand, one hundred thirty-one".