654685331 has 2 divisors, whose sum is σ = 654685332. Its totient is φ = 654685330.

The previous prime is 654685327. The next prime is 654685349. The reversal of 654685331 is 133586456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 654685331 - 2² = 654685327 is a prime.

It is a super-2 number, since 2×654685331² = 857225765253159122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (654685531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327342665 + 327342666.

It is an arithmetic number, because the mean of its divisors is an integer number (327342666).

Almost surely, 2^654685331 is an apocalyptic number.

654685331 is a deficient number, since it is larger than the sum of its proper divisors (1).

654685331 is an equidigital number, since it uses as much as digits as its factorization.

654685331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 41.

The square root of 654685331 is about 25586.8194780047. The cubic root of 654685331 is about 868.3154663780.

The spelling of 654685331 in words is "six hundred fifty-four million, six hundred eighty-five thousand, three hundred thirty-one".