1390308431 has 2 divisors, whose sum is σ = 1390308432. Its totient is φ = 1390308430.

The previous prime is 1390308389. The next prime is 1390308443. The reversal of 1390308431 is 1348030931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1390308431 - 2¹⁴ = 1390292047 is a prime.

It is a super-2 number, since 2×1390308431² = 3865915066619363522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390308461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695154215 + 695154216.

It is an arithmetic number, because the mean of its divisors is an integer number (695154216).

Almost surely, 2^1390308431 is an apocalyptic number.

1390308431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390308431 is an equidigital number, since it uses as much as digits as its factorization.

1390308431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1390308431 is about 37286.8399170538. The cubic root of 1390308431 is about 1116.1015693475.

The spelling of 1390308431 in words is "one billion, three hundred ninety million, three hundred eight thousand, four hundred thirty-one".