654912321 has 32 divisors (see below), whose sum is σ = 1031420928. Its totient is φ = 361817280.

The previous prime is 654912299. The next prime is 654912347. The reversal of 654912321 is 123219456.

It is not a de Polignac number, because 654912321 - 2⁶ = 654912257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (654912371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124066 + ... + 129236.

It is an arithmetic number, because the mean of its divisors is an integer number (32231904).

Almost surely, 2^654912321 is an apocalyptic number.

It is an amenable number.

654912321 is a deficient number, since it is larger than the sum of its proper divisors (376508607).

654912321 is a wasteful number, since it uses less digits than its factorization.

654912321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381.

The product of its digits is 12960, while the sum is 33.

The square root of 654912321 is about 25591.2547758018. The cubic root of 654912321 is about 868.4158077907.

The spelling of 654912321 in words is "six hundred fifty-four million, nine hundred twelve thousand, three hundred twenty-one".