2149640759 has 4 divisors (see below), whose sum is σ = 2456732304. Its totient is φ = 1842549216.

The previous prime is 2149640723. The next prime is 2149640761. The reversal of 2149640759 is 9570469412.

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 2149640759 - 2⁸ = 2149640503 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 (2149640159) 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, 153545762 + ... + 153545775.

It is an arithmetic number, because the mean of its divisors is an integer number (614183076).

Almost surely, 2^2149640759 is an apocalyptic number.

2149640759 is a deficient number, since it is larger than the sum of its proper divisors (307091545).

2149640759 is an equidigital number, since it uses as much as digits as its factorization.

2149640759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307091544.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 2149640759 is about 46364.2185203202. The cubic root of 2149640759 is about 1290.5909915499.

The spelling of 2149640759 in words is "two billion, one hundred forty-nine million, six hundred forty thousand, seven hundred fifty-nine".