399103749 has 12 divisors (see below), whose sum is σ = 628890912. Its totient is φ = 241881000.

The previous prime is 399103711. The next prime is 399103777. The reversal of 399103749 is 947301993.

It is not a de Polignac number, because 399103749 - 2²³ = 390715141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399103049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2015577 + ... + 2015774.

It is an arithmetic number, because the mean of its divisors is an integer number (52407576).

Almost surely, 2^399103749 is an apocalyptic number.

It is an amenable number.

399103749 is a deficient number, since it is larger than the sum of its proper divisors (229787163).

399103749 is a wasteful number, since it uses less digits than its factorization.

399103749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031368 (or 4031365 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 399103749 is about 19977.5811598902. The cubic root of 399103749 is about 736.2555853887.

The spelling of 399103749 in words is "three hundred ninety-nine million, one hundred three thousand, seven hundred forty-nine".