390513997 has 2 divisors, whose sum is σ = 390513998. Its totient is φ = 390513996.

The previous prime is 390513943. The next prime is 390514027. The reversal of 390513997 is 799315093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288524196 + 101989801 = 16986^2 + 10099^2 .

It is an emirp because it is prime and its reverse (799315093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 390513997 - 2²⁷ = 256296269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390514997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195256998 + 195256999.

It is an arithmetic number, because the mean of its divisors is an integer number (195256999).

Almost surely, 2^390513997 is an apocalyptic number.

It is an amenable number.

390513997 is a deficient number, since it is larger than the sum of its proper divisors (1).

390513997 is an equidigital number, since it uses as much as digits as its factorization.

390513997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 229635, while the sum is 46.

The square root of 390513997 is about 19761.4269980687. The cubic root of 390513997 is about 730.9351853819.

The spelling of 390513997 in words is "three hundred ninety million, five hundred thirteen thousand, nine hundred ninety-seven".