390749851 has 2 divisors, whose sum is σ = 390749852. Its totient is φ = 390749850.

The previous prime is 390749837. The next prime is 390749881. The reversal of 390749851 is 158947093.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 390749851 - 2⁹ = 390749339 is a prime.

It is not a weakly prime, because it can be changed into another prime (390749831) 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, 195374925 + 195374926.

It is an arithmetic number, because the mean of its divisors is an integer number (195374926).

Almost surely, 2^390749851 is an apocalyptic number.

390749851 is a deficient number, since it is larger than the sum of its proper divisors (1).

390749851 is an equidigital number, since it uses as much as digits as its factorization.

390749851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 390749851 is about 19767.3936319384. The cubic root of 390749851 is about 731.0823071189.

The spelling of 390749851 in words is "three hundred ninety million, seven hundred forty-nine thousand, eight hundred fifty-one".