654388961 has 2 divisors, whose sum is σ = 654388962. Its totient is φ = 654388960.

The previous prime is 654388913. The next prime is 654388967. The reversal of 654388961 is 169883456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 649281361 + 5107600 = 25481^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 654388961 - 2⁶ = 654388897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (654388967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327194480 + 327194481.

It is an arithmetic number, because the mean of its divisors is an integer number (327194481).

Almost surely, 2^654388961 is an apocalyptic number.

It is an amenable number.

654388961 is a deficient number, since it is larger than the sum of its proper divisors (1).

654388961 is an equidigital number, since it uses as much as digits as its factorization.

654388961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 50.

The square root of 654388961 is about 25581.0273640446. The cubic root of 654388961 is about 868.1844204721.

The spelling of 654388961 in words is "six hundred fifty-four million, three hundred eighty-eight thousand, nine hundred sixty-one".