399122827 has 2 divisors, whose sum is σ = 399122828. Its totient is φ = 399122826.

The previous prime is 399122813. The next prime is 399122831. The reversal of 399122827 is 728221993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399122827 - 2¹¹ = 399120779 is a prime.

It is not a weakly prime, because it can be changed into another prime (399122527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199561413 + 199561414.

It is an arithmetic number, because the mean of its divisors is an integer number (199561414).

Almost surely, 2^399122827 is an apocalyptic number.

399122827 is a deficient number, since it is larger than the sum of its proper divisors (1).

399122827 is an equidigital number, since it uses as much as digits as its factorization.

399122827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 399122827 is about 19978.0586394174. The cubic root of 399122827 is about 736.2673167245.

The spelling of 399122827 in words is "three hundred ninety-nine million, one hundred twenty-two thousand, eight hundred twenty-seven".