653969291 has 2 divisors, whose sum is σ = 653969292. Its totient is φ = 653969290.

The previous prime is 653969249. The next prime is 653969297. The reversal of 653969291 is 192969356.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653969291 is a prime.

It is not a weakly prime, because it can be changed into another prime (653969297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326984645 + 326984646.

It is an arithmetic number, because the mean of its divisors is an integer number (326984646).

Almost surely, 2^653969291 is an apocalyptic number.

653969291 is a deficient number, since it is larger than the sum of its proper divisors (1).

653969291 is an equidigital number, since it uses as much as digits as its factorization.

653969291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 50.

The square root of 653969291 is about 25572.8232895783. The cubic root of 653969291 is about 867.9987873124.

The spelling of 653969291 in words is "six hundred fifty-three million, nine hundred sixty-nine thousand, two hundred ninety-one".