390612793 has 2 divisors, whose sum is σ = 390612794. Its totient is φ = 390612792.

The previous prime is 390612767. The next prime is 390612797. The reversal of 390612793 is 397216093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343991209 + 46621584 = 18547^2 + 6828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390612793 is a prime.

It is not a weakly prime, because it can be changed into another prime (390612797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195306396 + 195306397.

It is an arithmetic number, because the mean of its divisors is an integer number (195306397).

Almost surely, 2^390612793 is an apocalyptic number.

It is an amenable number.

390612793 is a deficient number, since it is larger than the sum of its proper divisors (1).

390612793 is an equidigital number, since it uses as much as digits as its factorization.

390612793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 390612793 is about 19763.9265582525. The cubic root of 390612793 is about 730.9968198639.

The spelling of 390612793 in words is "three hundred ninety million, six hundred twelve thousand, seven hundred ninety-three".