2539913913 has 12 divisors (see below), whose sum is σ = 3728909028. Its totient is φ = 1665516960.

The previous prime is 2539913899. The next prime is 2539913927. The reversal of 2539913913 is 3193199352.

It is a happy number.

2539913913 is a `hidden beast` number, since 253 + 9 + 9 + 1 + 391 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (2539913899) and next prime (2539913927).

It can be written as a sum of positive squares in 2 ways, for example, as 579461184 + 1960452729 = 24072^2 + 44277^2 .

It is not a de Polignac number, because 2539913913 - 2⁵ = 2539913881 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2539913953) 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, 2312670 + ... + 2313767.

It is an arithmetic number, because the mean of its divisors is an integer number (310742419).

Almost surely, 2^2539913913 is an apocalyptic number.

It is an amenable number.

2539913913 is a deficient number, since it is larger than the sum of its proper divisors (1188995115).

2539913913 is a wasteful number, since it uses less digits than its factorization.

2539913913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626504 (or 4626501 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 2539913913 is about 50397.5586015831. The cubic root of 2539913913 is about 1364.3935751689.

The spelling of 2539913913 in words is "two billion, five hundred thirty-nine million, nine hundred thirteen thousand, nine hundred thirteen".