390479923 has 2 divisors, whose sum is σ = 390479924. Its totient is φ = 390479922.

The previous prime is 390479863. The next prime is 390479933. The reversal of 390479923 is 329974093.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390479923 is a prime.

It is not a weakly prime, because it can be changed into another prime (390479933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195239961 + 195239962.

It is an arithmetic number, because the mean of its divisors is an integer number (195239962).

Almost surely, 2^390479923 is an apocalyptic number.

390479923 is a deficient number, since it is larger than the sum of its proper divisors (1).

390479923 is an equidigital number, since it uses as much as digits as its factorization.

390479923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 46.

The square root of 390479923 is about 19760.5648451657. The cubic root of 390479923 is about 730.9139257001.

The spelling of 390479923 in words is "three hundred ninety million, four hundred seventy-nine thousand, nine hundred twenty-three".