1390260631 has 2 divisors, whose sum is σ = 1390260632. Its totient is φ = 1390260630.

The previous prime is 1390260593. The next prime is 1390260659. The reversal of 1390260631 is 1360620931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1390260631 - 2¹⁵ = 1390227863 is a prime.

It is a super-2 number, since 2×1390260631² = 3865649244217036322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1390260593 and 1390260602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390260661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695130315 + 695130316.

It is an arithmetic number, because the mean of its divisors is an integer number (695130316).

Almost surely, 2^1390260631 is an apocalyptic number.

1390260631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390260631 is an equidigital number, since it uses as much as digits as its factorization.

1390260631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 1390260631 is about 37286.1989347265. The cubic root of 1390260631 is about 1116.0887783569.

The spelling of 1390260631 in words is "one billion, three hundred ninety million, two hundred sixty thousand, six hundred thirty-one".