445561889 has 4 divisors (see below), whose sum is σ = 445689024. Its totient is φ = 445434756.

The previous prime is 445561871. The next prime is 445561903. The reversal of 445561889 is 988165544.

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 a de Polignac number, because none of the positive numbers 2^k-445561889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445569889) 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, 58157 + ... + 65370.

It is an arithmetic number, because the mean of its divisors is an integer number (111422256).

Almost surely, 2^445561889 is an apocalyptic number.

It is an amenable number.

445561889 is a deficient number, since it is larger than the sum of its proper divisors (127135).

445561889 is a wasteful number, since it uses less digits than its factorization.

445561889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127134.

The product of its digits is 1382400, while the sum is 50.

The square root of 445561889 is about 21108.3369548622. The cubic root of 445561889 is about 763.7818704462.

The spelling of 445561889 in words is "four hundred forty-five million, five hundred sixty-one thousand, eight hundred eighty-nine".