1390137851 has 2 divisors, whose sum is σ = 1390137852. Its totient is φ = 1390137850.

The previous prime is 1390137811. The next prime is 1390137883. The reversal of 1390137851 is 1587310931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1390137851 - 2¹⁰ = 1390136827 is a prime.

It is not a weakly prime, because it can be changed into another prime (1390137811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695068925 + 695068926.

It is an arithmetic number, because the mean of its divisors is an integer number (695068926).

Almost surely, 2^1390137851 is an apocalyptic number.

1390137851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390137851 is an equidigital number, since it uses as much as digits as its factorization.

1390137851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 1390137851 is about 37284.5524446787. The cubic root of 1390137851 is about 1116.0559218283.

The spelling of 1390137851 in words is "one billion, three hundred ninety million, one hundred thirty-seven thousand, eight hundred fifty-one".