86139495 has 48 divisors (see below), whose sum is σ = 161747040. Its totient is φ = 42156288.

The previous prime is 86139491. The next prime is 86139509. The reversal of 86139495 is 59493168.

It is a happy number.

It is not a de Polignac number, because 86139495 - 2² = 86139491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 86139495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86139491) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133644 + ... + 134286.

It is an arithmetic number, because the mean of its divisors is an integer number (3369730).

It is a vampire number, since it can be written as 8931 ⋅ 9645 (with its own digits).

Almost surely, 2^86139495 is an apocalyptic number.

86139495 is a deficient number, since it is larger than the sum of its proper divisors (75607545).

86139495 is a wasteful number, since it uses less digits than its factorization.

86139495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 893 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 86139495 is about 9281.1365144577. The cubic root of 86139495 is about 441.6390229920.

The spelling of 86139495 in words is "eighty-six million, one hundred thirty-nine thousand, four hundred ninety-five".