118916881 has 2 divisors, whose sum is σ = 118916882. Its totient is φ = 118916880.

The previous prime is 118916873. The next prime is 118916957. The reversal of 118916881 is 188619811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70140625 + 48776256 = 8375^2 + 6984^2 .

It is a cyclic number.

It is not a de Polignac number, because 118916881 - 2³ = 118916873 is a prime.

It is a super-2 number, since 2×118916881² = 28282449173536322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (118916381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59458440 + 59458441.

It is an arithmetic number, because the mean of its divisors is an integer number (59458441).

Almost surely, 2^118916881 is an apocalyptic number.

It is an amenable number.

118916881 is a deficient number, since it is larger than the sum of its proper divisors (1).

118916881 is an equidigital number, since it uses as much as digits as its factorization.

118916881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 43.

The square root of 118916881 is about 10904.9016960264. The cubic root of 118916881 is about 491.7539268405.

The spelling of 118916881 in words is "one hundred eighteen million, nine hundred sixteen thousand, eight hundred eighty-one".