399366269 has 2 divisors, whose sum is σ = 399366270. Its totient is φ = 399366268.

The previous prime is 399366259. The next prime is 399366287. The reversal of 399366269 is 962663993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225390169 + 173976100 = 15013^2 + 13190^2 .

It is a cyclic number.

It is not a de Polignac number, because 399366269 - 2⁸ = 399366013 is a prime.

It is a super-2 number, since 2×399366269² = 318986833629960722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399366269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399366239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199683134 + 199683135.

It is an arithmetic number, because the mean of its divisors is an integer number (199683135).

Almost surely, 2^399366269 is an apocalyptic number.

It is an amenable number.

399366269 is a deficient number, since it is larger than the sum of its proper divisors (1).

399366269 is an equidigital number, since it uses as much as digits as its factorization.

399366269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2834352, while the sum is 53.

The square root of 399366269 is about 19984.1504447900. The cubic root of 399366269 is about 736.4169798913.

The spelling of 399366269 in words is "three hundred ninety-nine million, three hundred sixty-six thousand, two hundred sixty-nine".