654404689 has 2 divisors, whose sum is σ = 654404690. Its totient is φ = 654404688.

The previous prime is 654404683. The next prime is 654404741. The reversal of 654404689 is 986404456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571449025 + 82955664 = 23905^2 + 9108^2 .

It is a cyclic number.

It is not a de Polignac number, because 654404689 - 2⁷ = 654404561 is a prime.

It is not a weakly prime, because it can be changed into another prime (654404683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327202344 + 327202345.

It is an arithmetic number, because the mean of its divisors is an integer number (327202345).

Almost surely, 2^654404689 is an apocalyptic number.

It is an amenable number.

654404689 is a deficient number, since it is larger than the sum of its proper divisors (1).

654404689 is an equidigital number, since it uses as much as digits as its factorization.

654404689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 46.

The square root of 654404689 is about 25581.3347775287. The cubic root of 654404689 is about 868.1913759150.

The spelling of 654404689 in words is "six hundred fifty-four million, four hundred four thousand, six hundred eighty-nine".