653969249 has 2 divisors, whose sum is σ = 653969250. Its totient is φ = 653969248.

The previous prime is 653969231. The next prime is 653969291. The reversal of 653969249 is 942969356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393308224 + 260661025 = 19832^2 + 16145^2 .

It is a cyclic number.

It is not a de Polignac number, because 653969249 - 2²⁰ = 652920673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 653969249.

It is not a weakly prime, because it can be changed into another prime (653969219) 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, 326984624 + 326984625.

It is an arithmetic number, because the mean of its divisors is an integer number (326984625).

Almost surely, 2^653969249 is an apocalyptic number.

It is an amenable number.

653969249 is a deficient number, since it is larger than the sum of its proper divisors (1).

653969249 is an equidigital number, since it uses as much as digits as its factorization.

653969249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3149280, while the sum is 53.

The square root of 653969249 is about 25572.8224683941. The cubic root of 653969249 is about 867.9987687305.

The spelling of 653969249 in words is "six hundred fifty-three million, nine hundred sixty-nine thousand, two hundred forty-nine".