1390338941 has 2 divisors, whose sum is σ = 1390338942. Its totient is φ = 1390338940.

The previous prime is 1390338919. The next prime is 1390338959. The reversal of 1390338941 is 1498330931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050084025 + 340254916 = 32405^2 + 18446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1390338941 is a prime.

It is a super-2 number, since 2×1390338941² = 3866084741722002962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390338541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695169470 + 695169471.

It is an arithmetic number, because the mean of its divisors is an integer number (695169471).

Almost surely, 2^1390338941 is an apocalyptic number.

It is an amenable number.

1390338941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390338941 is an equidigital number, since it uses as much as digits as its factorization.

1390338941 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 1390338941 is about 37287.2490403891. The cubic root of 1390338941 is about 1116.1097334856.

The spelling of 1390338941 in words is "one billion, three hundred ninety million, three hundred thirty-eight thousand, nine hundred forty-one".