399140913 has 16 divisors (see below), whose sum is σ = 542564352. Its totient is φ = 260946000.

The previous prime is 399140899. The next prime is 399140927. The reversal of 399140913 is 319041993.

It is an interprime number because it is at equal distance from previous prime (399140899) and next prime (399140927).

It is not a de Polignac number, because 399140913 - 2⁴ = 399140897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399141913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35778 + ... + 45588.

It is an arithmetic number, because the mean of its divisors is an integer number (33910272).

Almost surely, 2^399140913 is an apocalyptic number.

It is an amenable number.

399140913 is a deficient number, since it is larger than the sum of its proper divisors (143423439).

399140913 is a wasteful number, since it uses less digits than its factorization.

399140913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10076.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 399140913 is about 19978.5112808738. The cubic root of 399140913 is about 736.2784377200.

The spelling of 399140913 in words is "three hundred ninety-nine million, one hundred forty thousand, nine hundred thirteen".