2639125379 has 4 divisors (see below), whose sum is σ = 2879045880. Its totient is φ = 2399204880.

The previous prime is 2639125369. The next prime is 2639125397. The reversal of 2639125379 is 9735219362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2639125379 - 2²⁰ = 2638076803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2639125369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119960234 + ... + 119960255.

It is an arithmetic number, because the mean of its divisors is an integer number (719761470).

Almost surely, 2^2639125379 is an apocalyptic number.

2639125379 is a deficient number, since it is larger than the sum of its proper divisors (239920501).

2639125379 is a wasteful number, since it uses less digits than its factorization.

2639125379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239920500.

The product of its digits is 612360, while the sum is 47.

The square root of 2639125379 is about 51372.4184655541. The cubic root of 2639125379 is about 1381.9320028495.

The spelling of 2639125379 in words is "two billion, six hundred thirty-nine million, one hundred twenty-five thousand, three hundred seventy-nine".