654512389 has 4 divisors (see below), whose sum is σ = 654604524. Its totient is φ = 654420256.

The previous prime is 654512387. The next prime is 654512413. The reversal of 654512389 is 983215456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 541260225 + 113252164 = 23265^2 + 10642^2 .

It is a cyclic number.

It is not a de Polignac number, because 654512389 - 2¹ = 654512387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654512381) 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, 34432 + ... + 49945.

It is an arithmetic number, because the mean of its divisors is an integer number (163651131).

Almost surely, 2^654512389 is an apocalyptic number.

It is an amenable number.

654512389 is a deficient number, since it is larger than the sum of its proper divisors (92135).

654512389 is an equidigital number, since it uses as much as digits as its factorization.

654512389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92134.

The product of its digits is 259200, while the sum is 43.

The square root of 654512389 is about 25583.4397413639. The cubic root of 654512389 is about 868.2390014306.

The spelling of 654512389 in words is "six hundred fifty-four million, five hundred twelve thousand, three hundred eighty-nine".