654489889 has 3 divisors (see below), whose sum is σ = 654515473. Its totient is φ = 654464306.

The previous prime is 654489883. The next prime is 654489911. The reversal of 654489889 is 988984456.

The square root of 654489889 is 25583.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 654489889 - 2⁷ = 654489761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654489883) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12792 + ... + 38374.

Almost surely, 2^654489889 is an apocalyptic number.

654489889 is the 25583-rd square number.

654489889 is the 12792-nd centered octagonal number.

It is an amenable number.

654489889 is a deficient number, since it is larger than the sum of its proper divisors (25584).

654489889 is an frugal number, since it uses more digits than its factorization.

654489889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51166 (or 25583 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 61.

The cubic root of 654489889 is about 868.2290522421.

The spelling of 654489889 in words is "six hundred fifty-four million, four hundred eighty-nine thousand, eight hundred eighty-nine".