390660379 has 2 divisors, whose sum is σ = 390660380. Its totient is φ = 390660378.

The previous prime is 390660367. The next prime is 390660407. The reversal of 390660379 is 973066093.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390660379 is a prime.

It is not a weakly prime, because it can be changed into another prime (390660679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195330189 + 195330190.

It is an arithmetic number, because the mean of its divisors is an integer number (195330190).

Almost surely, 2^390660379 is an apocalyptic number.

390660379 is a deficient number, since it is larger than the sum of its proper divisors (1).

390660379 is an equidigital number, since it uses as much as digits as its factorization.

390660379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 43.

The square root of 390660379 is about 19765.1303815583. The cubic root of 390660379 is about 731.0265029693.

The spelling of 390660379 in words is "three hundred ninety million, six hundred sixty thousand, three hundred seventy-nine".