86955021 has 12 divisors (see below), whose sum is σ = 129933180. Its totient is φ = 55970880.

The previous prime is 86955007. The next prime is 86955061. The reversal of 86955021 is 12055968.

It is a happy number.

86955021 is a `hidden beast` number, since 86 + 9 + 550 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 54908100 + 32046921 = 7410^2 + 5661^2 .

It is not a de Polignac number, because 86955021 - 2⁹ = 86954509 is a prime.

It is a super-2 number, since 2×86955021² = 15122351354220882, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86955061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166320 + ... + 166841.

It is an arithmetic number, because the mean of its divisors is an integer number (10827765).

Almost surely, 2^86955021 is an apocalyptic number.

It is an amenable number.

86955021 is a deficient number, since it is larger than the sum of its proper divisors (42978159).

86955021 is a wasteful number, since it uses less digits than its factorization.

86955021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333196 (or 333193 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 86955021 is about 9324.9676138848. The cubic root of 86955021 is about 443.0283872852.

The spelling of 86955021 in words is "eighty-six million, nine hundred fifty-five thousand, twenty-one".