113781938 has 4 divisors (see below), whose sum is σ = 170672910. Its totient is φ = 56890968.

The previous prime is 113781931. The next prime is 113781949. The reversal of 113781938 is 839187311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 839187311 = 977 ⋅858943.

It can be written as a sum of positive squares in only one way, i.e., 113699569 + 82369 = 10663^2 + 287^2 .

It is a junction number, because it is equal to n+sod(n) for n = 113781895 and 113781904.

It is not an unprimeable number, because it can be changed into a prime (113781931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28445483 + ... + 28445486.

Almost surely, 2^113781938 is an apocalyptic number.

113781938 is a deficient number, since it is larger than the sum of its proper divisors (56890972).

113781938 is an equidigital number, since it uses as much as digits as its factorization.

113781938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56890971.

The product of its digits is 36288, while the sum is 41.

The square root of 113781938 is about 10666.8616753008. The cubic root of 113781938 is about 484.5713973073.

The spelling of 113781938 in words is "one hundred thirteen million, seven hundred eighty-one thousand, nine hundred thirty-eight".