390402307 has 2 divisors, whose sum is σ = 390402308. Its totient is φ = 390402306.

The previous prime is 390402277. The next prime is 390402317. The reversal of 390402307 is 703204093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 390402307 - 2¹¹ = 390400259 is a prime.

It is a super-2 number, since 2×390402307² = 304827922621844498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (390402317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195201153 + 195201154.

It is an arithmetic number, because the mean of its divisors is an integer number (195201154).

Almost surely, 2^390402307 is an apocalyptic number.

390402307 is a deficient number, since it is larger than the sum of its proper divisors (1).

390402307 is an equidigital number, since it uses as much as digits as its factorization.

390402307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 390402307 is about 19758.6008360916. The cubic root of 390402307 is about 730.8654943800.

The spelling of 390402307 in words is "three hundred ninety million, four hundred two thousand, three hundred seven".