654597989 has 2 divisors, whose sum is σ = 654597990. Its totient is φ = 654597988.

The previous prime is 654597959. The next prime is 654598031. The reversal of 654597989 is 989795456.

654597989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 639837025 + 14760964 = 25295^2 + 3842^2 .

It is a cyclic number.

It is not a de Polignac number, because 654597989 - 2¹² = 654593893 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 (654597959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327298994 + 327298995.

It is an arithmetic number, because the mean of its divisors is an integer number (327298995).

Almost surely, 2^654597989 is an apocalyptic number.

It is an amenable number.

654597989 is a deficient number, since it is larger than the sum of its proper divisors (1).

654597989 is an equidigital number, since it uses as much as digits as its factorization.

654597989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24494400, while the sum is 62.

The square root of 654597989 is about 25585.1126438794. The cubic root of 654597989 is about 868.2768504818.

The spelling of 654597989 in words is "six hundred fifty-four million, five hundred ninety-seven thousand, nine hundred eighty-nine".