654667231 has 4 divisors (see below), whose sum is σ = 662554872. Its totient is φ = 646779592.

The previous prime is 654667171. The next prime is 654667243. The reversal of 654667231 is 132766456.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654667231 is a prime.

It is a super-2 number, since 2×654667231² = 857178366690414722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654667291) 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, 3943696 + ... + 3943861.

It is an arithmetic number, because the mean of its divisors is an integer number (165638718).

Almost surely, 2^654667231 is an apocalyptic number.

654667231 is a deficient number, since it is larger than the sum of its proper divisors (7887641).

654667231 is an equidigital number, since it uses as much as digits as its factorization.

654667231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7887640.

The product of its digits is 181440, while the sum is 40.

The square root of 654667231 is about 25586.4657778287. The cubic root of 654667231 is about 868.3074642360.

The spelling of 654667231 in words is "six hundred fifty-four million, six hundred sixty-seven thousand, two hundred thirty-one".