2642890189 has 4 divisors (see below), whose sum is σ = 2648910880. Its totient is φ = 2636869500.

The previous prime is 2642890171. The next prime is 2642890207. The reversal of 2642890189 is 9810982462.

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 an interprime number because it is at equal distance from previous prime (2642890171) and next prime (2642890207).

It is a cyclic number.

It is not a de Polignac number, because 2642890189 - 2⁵ = 2642890157 is a prime.

It is a super-2 number, since 2×2642890189² = 13969737102224911442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2642890169) 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, 3009687 + ... + 3010564.

It is an arithmetic number, because the mean of its divisors is an integer number (662227720).

Almost surely, 2^2642890189 is an apocalyptic number.

It is an amenable number.

2642890189 is a deficient number, since it is larger than the sum of its proper divisors (6020691).

2642890189 is an equidigital number, since it uses as much as digits as its factorization.

2642890189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6020690.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 2642890189 is about 51409.0477348103. The cubic root of 2642890189 is about 1382.5888163365.

The spelling of 2642890189 in words is "two billion, six hundred forty-two million, eight hundred ninety thousand, one hundred eighty-nine".