390973799 has 2 divisors, whose sum is σ = 390973800. Its totient is φ = 390973798.

The previous prime is 390973789. The next prime is 390973819. The reversal of 390973799 is 997379093.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 390973799 - 2⁸ = 390973543 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390973789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195486899 + 195486900.

It is an arithmetic number, because the mean of its divisors is an integer number (195486900).

Almost surely, 2^390973799 is an apocalyptic number.

390973799 is a deficient number, since it is larger than the sum of its proper divisors (1).

390973799 is an equidigital number, since it uses as much as digits as its factorization.

390973799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2893401, while the sum is 56.

The square root of 390973799 is about 19773.0574014238. The cubic root of 390973799 is about 731.2219473106.

The spelling of 390973799 in words is "three hundred ninety million, nine hundred seventy-three thousand, seven hundred ninety-nine".