118086921 has 12 divisors (see below), whose sum is σ = 172080948. Its totient is φ = 78027264.

The previous prime is 118086883. The next prime is 118086923. The reversal of 118086921 is 129680811.

It can be written as a sum of positive squares in 2 ways, for example, as 21261321 + 96825600 = 4611^2 + 9840^2 .

It is not a de Polignac number, because 118086921 - 2¹⁰ = 118085897 is a prime.

It is a super-2 number, since 2×118086921² = 27889041822520482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (118086923) 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, 57040 + ... + 59073.

It is an arithmetic number, because the mean of its divisors is an integer number (14340079).

Almost surely, 2^118086921 is an apocalyptic number.

It is an amenable number.

118086921 is a deficient number, since it is larger than the sum of its proper divisors (53994027).

118086921 is a wasteful number, since it uses less digits than its factorization.

118086921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116232 (or 116229 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 118086921 is about 10866.7806180119. The cubic root of 118086921 is about 490.6072175036.

The spelling of 118086921 in words is "one hundred eighteen million, eighty-six thousand, nine hundred twenty-one".