2539117621 has 4 divisors (see below), whose sum is σ = 2598166912. Its totient is φ = 2480068332.

The previous prime is 2539117547. The next prime is 2539117627. The reversal of 2539117621 is 1267119352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2539117621 - 2⁹ = 2539117109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539117627) 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, 29524581 + ... + 29524666.

It is an arithmetic number, because the mean of its divisors is an integer number (649541728).

Almost surely, 2^2539117621 is an apocalyptic number.

It is an amenable number.

2539117621 is a deficient number, since it is larger than the sum of its proper divisors (59049291).

2539117621 is an equidigital number, since it uses as much as digits as its factorization.

2539117621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59049290.

The product of its digits is 22680, while the sum is 37.

The square root of 2539117621 is about 50389.6578773859. The cubic root of 2539117621 is about 1364.2509759465.

The spelling of 2539117621 in words is "two billion, five hundred thirty-nine million, one hundred seventeen thousand, six hundred twenty-one".