1113251978 has 4 divisors (see below), whose sum is σ = 1669877970. Its totient is φ = 556625988.

The previous prime is 1113251977. The next prime is 1113252001. The reversal of 1113251978 is 8791523111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 826390009 + 286861969 = 28747^2 + 16937^2 .

It is not an unprimeable number, because it can be changed into a prime (1113251977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278312993 + ... + 278312996.

Almost surely, 2^1113251978 is an apocalyptic number.

1113251978 is a deficient number, since it is larger than the sum of its proper divisors (556625992).

1113251978 is an equidigital number, since it uses as much as digits as its factorization.

1113251978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556625991.

The product of its digits is 15120, while the sum is 38.

The square root of 1113251978 is about 33365.4308828764. The cubic root of 1113251978 is about 1036.4089589845.

The spelling of 1113251978 in words is "one billion, one hundred thirteen million, two hundred fifty-one thousand, nine hundred seventy-eight".