2139370889 has 4 divisors (see below), whose sum is σ = 2140256256. Its totient is φ = 2138485524.

The previous prime is 2139370879. The next prime is 2139370897. The reversal of 2139370889 is 9880739312.

It is a happy number.

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 2139370889 - 2¹² = 2139366793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139370819) 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, 439049 + ... + 443894.

It is an arithmetic number, because the mean of its divisors is an integer number (535064064).

Almost surely, 2^2139370889 is an apocalyptic number.

It is an amenable number.

2139370889 is a deficient number, since it is larger than the sum of its proper divisors (885367).

2139370889 is an equidigital number, since it uses as much as digits as its factorization.

2139370889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885366.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 2139370889 is about 46253.3338149803. Note that the first 3 decimals coincide. The cubic root of 2139370889 is about 1288.5324514445.

The spelling of 2139370889 in words is "two billion, one hundred thirty-nine million, three hundred seventy thousand, eight hundred eighty-nine".