399514813 has 2 divisors, whose sum is σ = 399514814. Its totient is φ = 399514812.

The previous prime is 399514751. The next prime is 399514823. The reversal of 399514813 is 318415993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383298084 + 16216729 = 19578^2 + 4027^2 .

It is a cyclic number.

It is not a de Polignac number, because 399514813 - 2¹³ = 399506621 is a prime.

It is a super-2 number, since 2×399514813² = 319224171612849938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 399514813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399514823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199757406 + 199757407.

It is an arithmetic number, because the mean of its divisors is an integer number (199757407).

Almost surely, 2^399514813 is an apocalyptic number.

It is an amenable number.

399514813 is a deficient number, since it is larger than the sum of its proper divisors (1).

399514813 is an equidigital number, since it uses as much as digits as its factorization.

399514813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The square root of 399514813 is about 19987.8666445421. The cubic root of 399514813 is about 736.5082718311.

The spelling of 399514813 in words is "three hundred ninety-nine million, five hundred fourteen thousand, eight hundred thirteen".