390709513 has 2 divisors, whose sum is σ = 390709514. Its totient is φ = 390709512.

The previous prime is 390709493. The next prime is 390709607. The reversal of 390709513 is 315907093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305830144 + 84879369 = 17488^2 + 9213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390709513 is a prime.

It is not a weakly prime, because it can be changed into another prime (390703513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195354756 + 195354757.

It is an arithmetic number, because the mean of its divisors is an integer number (195354757).

Almost surely, 2^390709513 is an apocalyptic number.

It is an amenable number.

390709513 is a deficient number, since it is larger than the sum of its proper divisors (1).

390709513 is an equidigital number, since it uses as much as digits as its factorization.

390709513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25515, while the sum is 37.

The square root of 390709513 is about 19766.3732889977. The cubic root of 390709513 is about 731.0571491541.

The spelling of 390709513 in words is "three hundred ninety million, seven hundred nine thousand, five hundred thirteen".