654591889 has 16 divisors (see below), whose sum is σ = 766457856. Its totient is φ = 547390800.

The previous prime is 654591869. The next prime is 654591911. The reversal of 654591889 is 988195456.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654591889 is a prime.

It is a super-2 number, since 2×654591889² = 856981082289176642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654591829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105894 + ... + 111904.

It is an arithmetic number, because the mean of its divisors is an integer number (47903616).

Almost surely, 2^654591889 is an apocalyptic number.

It is an amenable number.

654591889 is a deficient number, since it is larger than the sum of its proper divisors (111865967).

654591889 is a wasteful number, since it uses less digits than its factorization.

654591889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6396.

The product of its digits is 3110400, while the sum is 55.

The square root of 654591889 is about 25584.9934336517. The cubic root of 654591889 is about 868.2741534039.

It can be divided in two parts, 65 and 4591889, that added together give a palindrome (4591954).

The spelling of 654591889 in words is "six hundred fifty-four million, five hundred ninety-one thousand, eight hundred eighty-nine".