1390462961 has 2 divisors, whose sum is σ = 1390462962. Its totient is φ = 1390462960.

The previous prime is 1390462939. The next prime is 1390462973. The reversal of 1390462961 is 1692640931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 987216400 + 403246561 = 31420^2 + 20081^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390462961 - 2³⁰ = 316721137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1390462361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695231480 + 695231481.

It is an arithmetic number, because the mean of its divisors is an integer number (695231481).

Almost surely, 2^1390462961 is an apocalyptic number.

It is an amenable number.

1390462961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390462961 is an equidigital number, since it uses as much as digits as its factorization.

1390462961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 1390462961 is about 37288.9120382990. The cubic root of 1390462961 is about 1116.1429186343.

The spelling of 1390462961 in words is "one billion, three hundred ninety million, four hundred sixty-two thousand, nine hundred sixty-one".