654589693 has 2 divisors, whose sum is σ = 654589694. Its totient is φ = 654589692.

The previous prime is 654589679. The next prime is 654589703. The reversal of 654589693 is 396985456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 410386564 + 244203129 = 20258^2 + 15627^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654589693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654589603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327294846 + 327294847.

It is an arithmetic number, because the mean of its divisors is an integer number (327294847).

Almost surely, 2^654589693 is an apocalyptic number.

It is an amenable number.

654589693 is a deficient number, since it is larger than the sum of its proper divisors (1).

654589693 is an equidigital number, since it uses as much as digits as its factorization.

654589693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6998400, while the sum is 55.

The square root of 654589693 is about 25584.9505178337. The cubic root of 654589693 is about 868.2731824518.

The spelling of 654589693 in words is "six hundred fifty-four million, five hundred eighty-nine thousand, six hundred ninety-three".