2187363989 has 4 divisors (see below), whose sum is σ = 2213717856. Its totient is φ = 2161010124.

The previous prime is 2187363979. The next prime is 2187363991. The reversal of 2187363989 is 9893637812.

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 2187363989 - 2²⁴ = 2170586773 is a prime.

It is a super-2 number, since 2×2187363989² = 9569122440747984242, 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 (2187363949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13176809 + ... + 13176974.

It is an arithmetic number, because the mean of its divisors is an integer number (553429464).

Almost surely, 2^2187363989 is an apocalyptic number.

It is an amenable number.

2187363989 is a deficient number, since it is larger than the sum of its proper divisors (26353867).

2187363989 is an equidigital number, since it uses as much as digits as its factorization.

2187363989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26353866.

The product of its digits is 3919104, while the sum is 56.

The square root of 2187363989 is about 46769.2632933212. The cubic root of 2187363989 is about 1298.0966206646.

The spelling of 2187363989 in words is "two billion, one hundred eighty-seven million, three hundred sixty-three thousand, nine hundred eighty-nine".