2539691963 has 4 divisors (see below), whose sum is σ = 2539794048. Its totient is φ = 2539589880.

The previous prime is 2539691933. The next prime is 2539691969. The reversal of 2539691963 is 3691969352.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2539691963 - 2⁶ = 2539691899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2539691969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13373 + ... + 72513.

It is an arithmetic number, because the mean of its divisors is an integer number (634948512).

Almost surely, 2^2539691963 is an apocalyptic number.

2539691963 is a deficient number, since it is larger than the sum of its proper divisors (102085).

2539691963 is an equidigital number, since it uses as much as digits as its factorization.

2539691963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102084.

The product of its digits is 2361960, while the sum is 53.

The square root of 2539691963 is about 50395.3565618897. The cubic root of 2539691963 is about 1364.3538315679.

The spelling of 2539691963 in words is "two billion, five hundred thirty-nine million, six hundred ninety-one thousand, nine hundred sixty-three".