2186149589 has 4 divisors (see below), whose sum is σ = 2354314956. Its totient is φ = 2017984224.

The previous prime is 2186149577. The next prime is 2186149591. The reversal of 2186149589 is 9859416812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 901500625 + 1284648964 = 30025^2 + 35842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2186149589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2186149589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2186149549) 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, 84082664 + ... + 84082689.

It is an arithmetic number, because the mean of its divisors is an integer number (588578739).

Almost surely, 2^2186149589 is an apocalyptic number.

It is an amenable number.

2186149589 is a deficient number, since it is larger than the sum of its proper divisors (168165367).

2186149589 is a wasteful number, since it uses less digits than its factorization.

2186149589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168165366.

The product of its digits is 1244160, while the sum is 53.

The square root of 2186149589 is about 46756.2786051243. The cubic root of 2186149589 is about 1297.8563466226.

The spelling of 2186149589 in words is "two billion, one hundred eighty-six million, one hundred forty-nine thousand, five hundred eighty-nine".