113129978 has 16 divisors (see below), whose sum is σ = 182998536. Its totient is φ = 52142400.

The previous prime is 113129977. The next prime is 113129983. The reversal of 113129978 is 879921311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11785489 + 101344489 = 3433^2 + 10067^2 .

It is not an unprimeable number, because it can be changed into a prime (113129977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19628 + ... + 24728.

Almost surely, 2^113129978 is an apocalyptic number.

113129978 is a deficient number, since it is larger than the sum of its proper divisors (69868558).

113129978 is a wasteful number, since it uses less digits than its factorization.

113129978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969.

The product of its digits is 27216, while the sum is 41.

The square root of 113129978 is about 10636.2577065432. The cubic root of 113129978 is about 483.6441074942.

The spelling of 113129978 in words is "one hundred thirteen million, one hundred twenty-nine thousand, nine hundred seventy-eight".