399822601 has 2 divisors, whose sum is σ = 399822602. Its totient is φ = 399822600.

The previous prime is 399822587. The next prime is 399822607. The reversal of 399822601 is 106228993.

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., 260015625 + 139806976 = 16125^2 + 11824^2 .

It is a cyclic number.

It is not a de Polignac number, because 399822601 - 2⁵ = 399822569 is a prime.

It is a super-2 number, since 2×399822601² = 319716224540810402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (399822607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199911300 + 199911301.

It is an arithmetic number, because the mean of its divisors is an integer number (199911301).

Almost surely, 2^399822601 is an apocalyptic number.

It is an amenable number.

399822601 is a deficient number, since it is larger than the sum of its proper divisors (1).

399822601 is an equidigital number, since it uses as much as digits as its factorization.

399822601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 399822601 is about 19995.5645331658. The cubic root of 399822601 is about 736.6973597043.

The spelling of 399822601 in words is "three hundred ninety-nine million, eight hundred twenty-two thousand, six hundred one".