399135701 has 2 divisors, whose sum is σ = 399135702. Its totient is φ = 399135700.

The previous prime is 399135691. The next prime is 399135713. The reversal of 399135701 is 107531993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393982801 + 5152900 = 19849^2 + 2270^2 .

It is a cyclic number.

It is not a de Polignac number, because 399135701 - 2⁶ = 399135637 is a prime.

It is a super-2 number, since 2×399135701² = 318618615625522802, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399135731) 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, 199567850 + 199567851.

It is an arithmetic number, because the mean of its divisors is an integer number (199567851).

Almost surely, 2^399135701 is an apocalyptic number.

It is an amenable number.

399135701 is a deficient number, since it is larger than the sum of its proper divisors (1).

399135701 is an equidigital number, since it uses as much as digits as its factorization.

399135701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25515, while the sum is 38.

The square root of 399135701 is about 19978.3808402983. The cubic root of 399135701 is about 736.2752329204.

The spelling of 399135701 in words is "three hundred ninety-nine million, one hundred thirty-five thousand, seven hundred one".