399160451 has 2 divisors, whose sum is σ = 399160452. Its totient is φ = 399160450.

The previous prime is 399160427. The next prime is 399160453. The reversal of 399160451 is 154061993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399160451 - 2⁶ = 399160387 is a prime.

Together with 399160453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (399160453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199580225 + 199580226.

It is an arithmetic number, because the mean of its divisors is an integer number (199580226).

Almost surely, 2^399160451 is an apocalyptic number.

399160451 is a deficient number, since it is larger than the sum of its proper divisors (1).

399160451 is an equidigital number, since it uses as much as digits as its factorization.

399160451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 399160451 is about 19979.0002502628. Note that the first 3 decimals coincide. The cubic root of 399160451 is about 736.2904511660.

The spelling of 399160451 in words is "three hundred ninety-nine million, one hundred sixty thousand, four hundred fifty-one".