1392372139 has 2 divisors, whose sum is σ = 1392372140. Its totient is φ = 1392372138.

The previous prime is 1392372109. The next prime is 1392372151. The reversal of 1392372139 is 9312732931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1392372139 - 2⁷ = 1392372011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1392372109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696186069 + 696186070.

It is an arithmetic number, because the mean of its divisors is an integer number (696186070).

Almost surely, 2^1392372139 is an apocalyptic number.

1392372139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392372139 is an equidigital number, since it uses as much as digits as its factorization.

1392372139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 40.

The square root of 1392372139 is about 37314.5030651622. The cubic root of 1392372139 is about 1116.6535257779.

It can be divided in two parts, 139237 and 2139, that added together give a square (141376 = 376²).

The spelling of 1392372139 in words is "one billion, three hundred ninety-two million, three hundred seventy-two thousand, one hundred thirty-nine".