654990089 has 6 divisors (see below), whose sum is σ = 709249806. Its totient is φ = 604606080.

The previous prime is 654990079. The next prime is 654990107. The reversal of 654990089 is 980099456.

It can be written as a sum of positive squares in 3 ways, for example, as 1420864 + 653569225 = 1192^2 + 25565^2 .

It is not a de Polignac number, because 654990089 - 2¹⁶ = 654924553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (654990079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1937672 + ... + 1938009.

It is an arithmetic number, because the mean of its divisors is an integer number (118208301).

Almost surely, 2^654990089 is an apocalyptic number.

It is an amenable number.

654990089 is a deficient number, since it is larger than the sum of its proper divisors (54259717).

654990089 is a wasteful number, since it uses less digits than its factorization.

654990089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875707 (or 3875694 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 654990089 is about 25592.7741559996. The cubic root of 654990089 is about 868.4501799681.

The spelling of 654990089 in words is "six hundred fifty-four million, nine hundred ninety thousand, eighty-nine".