390199699 has 2 divisors, whose sum is σ = 390199700. Its totient is φ = 390199698.

The previous prime is 390199679. The next prime is 390199703. The reversal of 390199699 is 996991093.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390199699 is a prime.

It is not a weakly prime, because it can be changed into another prime (390199639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195099849 + 195099850.

It is an arithmetic number, because the mean of its divisors is an integer number (195099850).

Almost surely, 2^390199699 is an apocalyptic number.

390199699 is a deficient number, since it is larger than the sum of its proper divisors (1).

390199699 is an equidigital number, since it uses as much as digits as its factorization.

390199699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1062882, while the sum is 55.

The square root of 390199699 is about 19753.4730870295. The cubic root of 390199699 is about 730.7390395093.

The spelling of 390199699 in words is "three hundred ninety million, one hundred ninety-nine thousand, six hundred ninety-nine".