118866131 has 2 divisors, whose sum is σ = 118866132. Its totient is φ = 118866130.

The previous prime is 118866079. The next prime is 118866133. The reversal of 118866131 is 131668811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 118866131 - 2⁶ = 118866067 is a prime.

It is a super-2 number, since 2×118866131² = 28258314197818322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 118866133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 118866091 and 118866100.

It is not a weakly prime, because it can be changed into another prime (118866133) 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 as a sum of consecutive naturals, namely, 59433065 + 59433066.

It is an arithmetic number, because the mean of its divisors is an integer number (59433066).

Almost surely, 2^118866131 is an apocalyptic number.

118866131 is a deficient number, since it is larger than the sum of its proper divisors (1).

118866131 is an equidigital number, since it uses as much as digits as its factorization.

118866131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 35.

The square root of 118866131 is about 10902.5745124718. The cubic root of 118866131 is about 491.6839618290.

The spelling of 118866131 in words is "one hundred eighteen million, eight hundred sixty-six thousand, one hundred thirty-one".