399100739 has 2 divisors, whose sum is σ = 399100740. Its totient is φ = 399100738.

The previous prime is 399100733. The next prime is 399100747. The reversal of 399100739 is 937001993.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399100739 is a prime.

It is a super-2 number, since 2×399100739² = 318562799740692242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 399100696 and 399100705.

It is not a weakly prime, because it can be changed into another prime (399100733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199550369 + 199550370.

It is an arithmetic number, because the mean of its divisors is an integer number (199550370).

Almost surely, 2^399100739 is an apocalyptic number.

399100739 is a deficient number, since it is larger than the sum of its proper divisors (1).

399100739 is an equidigital number, since it uses as much as digits as its factorization.

399100739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 399100739 is about 19977.5058253026. The cubic root of 399100739 is about 736.2537344624.

The spelling of 399100739 in words is "three hundred ninety-nine million, one hundred thousand, seven hundred thirty-nine".