399734911 has 2 divisors, whose sum is σ = 399734912. Its totient is φ = 399734910.

The previous prime is 399734879. The next prime is 399734947. The reversal of 399734911 is 119437993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399734911 - 2⁵ = 399734879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399734011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199867455 + 199867456.

It is an arithmetic number, because the mean of its divisors is an integer number (199867456).

Almost surely, 2^399734911 is an apocalyptic number.

399734911 is a deficient number, since it is larger than the sum of its proper divisors (1).

399734911 is an equidigital number, since it uses as much as digits as its factorization.

399734911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 46.

The square root of 399734911 is about 19993.3716766332. The cubic root of 399734911 is about 736.6434977209.

The spelling of 399734911 in words is "three hundred ninety-nine million, seven hundred thirty-four thousand, nine hundred eleven".