86121959 has 24 divisors (see below), whose sum is σ = 114058368. Its totient is φ = 64181040.

The previous prime is 86121953. The next prime is 86121961. The reversal of 86121959 is 95912168.

It is a happy number.

It is not a de Polignac number, because 86121959 - 2⁴ = 86121943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86121953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8924 + ... + 15870.

It is an arithmetic number, because the mean of its divisors is an integer number (4752432).

Almost surely, 2^86121959 is an apocalyptic number.

86121959 is a deficient number, since it is larger than the sum of its proper divisors (27936409).

86121959 is a wasteful number, since it uses less digits than its factorization.

86121959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6995 (or 6988 counting only the distinct ones).

The product of its digits is 38880, while the sum is 41.

The square root of 86121959 is about 9280.1917544844. The cubic root of 86121959 is about 441.6090518097.

The spelling of 86121959 in words is "eighty-six million, one hundred twenty-one thousand, nine hundred fifty-nine".