2639374989 has 4 divisors (see below), whose sum is σ = 3519166656. Its totient is φ = 1759583324.

The previous prime is 2639374981. The next prime is 2639375083. The reversal of 2639374989 is 9894739362.

2639374989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2639374989 - 2³ = 2639374981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639374981) 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, 439895829 + ... + 439895834.

It is an arithmetic number, because the mean of its divisors is an integer number (879791664).

Almost surely, 2^2639374989 is an apocalyptic number.

It is an amenable number.

2639374989 is a deficient number, since it is larger than the sum of its proper divisors (879791667).

2639374989 is an equidigital number, since it uses as much as digits as its factorization.

2639374989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879791666.

The product of its digits is 17635968, while the sum is 60.

The square root of 2639374989 is about 51374.8478245921. The cubic root of 2639374989 is about 1381.9755694512.

The spelling of 2639374989 in words is "two billion, six hundred thirty-nine million, three hundred seventy-four thousand, nine hundred eighty-nine".