1139396131 has 2 divisors, whose sum is σ = 1139396132. Its totient is φ = 1139396130.

The previous prime is 1139396113. The next prime is 1139396147. The reversal of 1139396131 is 1316939311.

Together with previous prime (1139396113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1139396131 - 2⁵ = 1139396099 is a prime.

It is a super-2 number, since 2×1139396131² = 2596447086675538322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1139396431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569698065 + 569698066.

It is an arithmetic number, because the mean of its divisors is an integer number (569698066).

Almost surely, 2^1139396131 is an apocalyptic number.

1139396131 is the 21349-th centered pentagonal number.

1139396131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139396131 is an equidigital number, since it uses as much as digits as its factorization.

1139396131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122, while the sum is 37.

The square root of 1139396131 is about 33754.9423196071. The cubic root of 1139396131 is about 1044.4594415880.

The spelling of 1139396131 in words is "one billion, one hundred thirty-nine million, three hundred ninety-six thousand, one hundred thirty-one".