118938131 has 4 divisors (see below), whose sum is σ = 128087232. Its totient is φ = 109789032.

The previous prime is 118938101. The next prime is 118938133. The reversal of 118938131 is 131839811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131839811 = 17 ⋅7755283.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118938131 is a prime.

It is a super-2 number, since 2×118938131² = 28292558011546322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 118938091 and 118938100.

It is not an unprimeable number, because it can be changed into a prime (118938133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4574531 + ... + 4574556.

It is an arithmetic number, because the mean of its divisors is an integer number (32021808).

Almost surely, 2^118938131 is an apocalyptic number.

118938131 is a deficient number, since it is larger than the sum of its proper divisors (9149101).

118938131 is an equidigital number, since it uses as much as digits as its factorization.

118938131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9149100.

The product of its digits is 5184, while the sum is 35.

The square root of 118938131 is about 10905.8759849908. The cubic root of 118938131 is about 491.7832166225.

The spelling of 118938131 in words is "one hundred eighteen million, nine hundred thirty-eight thousand, one hundred thirty-one".