654368591 has 2 divisors, whose sum is σ = 654368592. Its totient is φ = 654368590.

The previous prime is 654368563. The next prime is 654368599. The reversal of 654368591 is 195863456.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 654368591 - 2⁶ = 654368527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654368599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327184295 + 327184296.

It is an arithmetic number, because the mean of its divisors is an integer number (327184296).

Almost surely, 2^654368591 is an apocalyptic number.

654368591 is a deficient number, since it is larger than the sum of its proper divisors (1).

654368591 is an equidigital number, since it uses as much as digits as its factorization.

654368591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 47.

The square root of 654368591 is about 25580.6292143098. The cubic root of 654368591 is about 868.1754120173.

The spelling of 654368591 in words is "six hundred fifty-four million, three hundred sixty-eight thousand, five hundred ninety-one".