399093001 has 2 divisors, whose sum is σ = 399093002. Its totient is φ = 399093000.

The previous prime is 399092963. The next prime is 399093007. The reversal of 399093001 is 100390993.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323820025 + 75272976 = 17995^2 + 8676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399093001 is a prime.

It is not a weakly prime, because it can be changed into another prime (399093007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199546500 + 199546501.

It is an arithmetic number, because the mean of its divisors is an integer number (199546501).

Almost surely, 2^399093001 is an apocalyptic number.

It is an amenable number.

399093001 is a deficient number, since it is larger than the sum of its proper divisors (1).

399093001 is an equidigital number, since it uses as much as digits as its factorization.

399093001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 399093001 is about 19977.3121565440. The cubic root of 399093001 is about 736.2489761247.

The spelling of 399093001 in words is "three hundred ninety-nine million, ninety-three thousand, one".