1138379131 has 4 divisors (see below), whose sum is σ = 1142580064. Its totient is φ = 1134178200.

The previous prime is 1138379093. The next prime is 1138379141. The reversal of 1138379131 is 1319738311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138379131 is a prime.

It is a super-2 number, since 2×1138379131² = 2591814091792630322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138379141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2100060 + ... + 2100601.

It is an arithmetic number, because the mean of its divisors is an integer number (285645016).

Almost surely, 2^1138379131 is an apocalyptic number.

1138379131 is a deficient number, since it is larger than the sum of its proper divisors (4200933).

1138379131 is an equidigital number, since it uses as much as digits as its factorization.

1138379131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200932.

The product of its digits is 13608, while the sum is 37.

The square root of 1138379131 is about 33739.8744959136. The cubic root of 1138379131 is about 1044.1485952204.

The spelling of 1138379131 in words is "one billion, one hundred thirty-eight million, three hundred seventy-nine thousand, one hundred thirty-one".