390056879 has 2 divisors, whose sum is σ = 390056880. Its totient is φ = 390056878.

The previous prime is 390056861. The next prime is 390056899. The reversal of 390056879 is 978650093.

It is a weak prime.

It is an emirp because it is prime and its reverse (978650093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 390056879 - 2²⁰ = 389008303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390056809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195028439 + 195028440.

It is an arithmetic number, because the mean of its divisors is an integer number (195028440).

Almost surely, 2^390056879 is an apocalyptic number.

390056879 is a deficient number, since it is larger than the sum of its proper divisors (1).

390056879 is an equidigital number, since it uses as much as digits as its factorization.

390056879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 390056879 is about 19749.8576956899. The cubic root of 390056879 is about 730.6498741532.

The spelling of 390056879 in words is "three hundred ninety million, fifty-six thousand, eight hundred seventy-nine".