399396001 has 2 divisors, whose sum is σ = 399396002. Its totient is φ = 399396000.

The previous prime is 399395933. The next prime is 399396013. The reversal of 399396001 is 100693993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254434401 + 144961600 = 15951^2 + 12040^2 .

It is an emirp because it is prime and its reverse (100693993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399396001 - 2⁷ = 399395873 is a prime.

It is a super-2 number, since 2×399396001² = 319034331229584002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (399396061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199698000 + 199698001.

It is an arithmetic number, because the mean of its divisors is an integer number (199698001).

Almost surely, 2^399396001 is an apocalyptic number.

It is an amenable number.

399396001 is a deficient number, since it is larger than the sum of its proper divisors (1).

399396001 is an equidigital number, since it uses as much as digits as its factorization.

399396001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 399396001 is about 19984.8943204611. The cubic root of 399396001 is about 736.4352543493.

The spelling of 399396001 in words is "three hundred ninety-nine million, three hundred ninety-six thousand, one".