654396961 has 2 divisors, whose sum is σ = 654396962. Its totient is φ = 654396960.

The previous prime is 654396947. The next prime is 654396991. The reversal of 654396961 is 169693456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 445421025 + 208975936 = 21105^2 + 14456^2 .

It is a cyclic number.

It is not a de Polignac number, because 654396961 - 2²³ = 646008353 is a prime.

It is not a weakly prime, because it can be changed into another prime (654396901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327198480 + 327198481.

It is an arithmetic number, because the mean of its divisors is an integer number (327198481).

Almost surely, 2^654396961 is an apocalyptic number.

It is an amenable number.

654396961 is a deficient number, since it is larger than the sum of its proper divisors (1).

654396961 is an equidigital number, since it uses as much as digits as its factorization.

654396961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 49.

The square root of 654396961 is about 25581.1837294524. The cubic root of 654396961 is about 868.1879583512.

The spelling of 654396961 in words is "six hundred fifty-four million, three hundred ninety-six thousand, nine hundred sixty-one".