653891291 has 2 divisors, whose sum is σ = 653891292. Its totient is φ = 653891290.

The previous prime is 653891261. The next prime is 653891297. The reversal of 653891291 is 192198356.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 653891291 - 2¹⁰ = 653890267 is a prime.

It is not a weakly prime, because it can be changed into another prime (653891297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326945645 + 326945646.

It is an arithmetic number, because the mean of its divisors is an integer number (326945646).

Almost surely, 2^653891291 is an apocalyptic number.

653891291 is a deficient number, since it is larger than the sum of its proper divisors (1).

653891291 is an equidigital number, since it uses as much as digits as its factorization.

653891291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 44.

The square root of 653891291 is about 25571.2981876165. The cubic root of 653891291 is about 867.9642767229.

The spelling of 653891291 in words is "six hundred fifty-three million, eight hundred ninety-one thousand, two hundred ninety-one".