11621889 has 6 divisors (see below), whose sum is σ = 16787186. Its totient is φ = 7747920.

The previous prime is 11621873. The next prime is 11621921. The reversal of 11621889 is 98812611.

It can be written as a sum of positive squares in only one way, i.e., 7935489 + 3686400 = 2817^2 + 1920^2 .

It is not a de Polignac number, because 11621889 - 2⁴ = 11621873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11621809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 645652 + ... + 645669.

Almost surely, 2^11621889 is an apocalyptic number.

It is an amenable number.

11621889 is a deficient number, since it is larger than the sum of its proper divisors (5165297).

11621889 is a wasteful number, since it uses less digits than its factorization.

11621889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291327 (or 1291324 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 11621889 is about 3409.0891745450. The cubic root of 11621889 is about 226.5125353061.

The spelling of 11621889 in words is "eleven million, six hundred twenty-one thousand, eight hundred eighty-nine".