86969031 has 4 divisors (see below), whose sum is σ = 115958712. Its totient is φ = 57979352.

The previous prime is 86969021. The next prime is 86969039. The reversal of 86969031 is 13096968.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86969031 is a prime.

It is a super-2 number, since 2×86969031² = 15127224706157922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86969039) 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, 14494836 + ... + 14494841.

It is an arithmetic number, because the mean of its divisors is an integer number (28989678).

Almost surely, 2^86969031 is an apocalyptic number.

86969031 is a deficient number, since it is larger than the sum of its proper divisors (28989681).

86969031 is a wasteful number, since it uses less digits than its factorization.

86969031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28989680.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 86969031 is about 9325.7187926722. The cubic root of 86969031 is about 443.0521792577.

The spelling of 86969031 in words is "eighty-six million, nine hundred sixty-nine thousand, thirty-one".