390479933 has 2 divisors, whose sum is σ = 390479934. Its totient is φ = 390479932.

The previous prime is 390479923. The next prime is 390479951. The reversal of 390479933 is 339974093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354455929 + 36024004 = 18827^2 + 6002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390479933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390479923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195239966 + 195239967.

It is an arithmetic number, because the mean of its divisors is an integer number (195239967).

Almost surely, 2^390479933 is an apocalyptic number.

It is an amenable number.

390479933 is a deficient number, since it is larger than the sum of its proper divisors (1).

390479933 is an equidigital number, since it uses as much as digits as its factorization.

390479933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 551124, while the sum is 47.

The square root of 390479933 is about 19760.5650981949. The cubic root of 390479933 is about 730.9139319396.

The spelling of 390479933 in words is "three hundred ninety million, four hundred seventy-nine thousand, nine hundred thirty-three".