653255791 has 2 divisors, whose sum is σ = 653255792. Its totient is φ = 653255790.

The previous prime is 653255749. The next prime is 653255797. The reversal of 653255791 is 197552356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 653255791 - 2²³ = 644867183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653255797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326627895 + 326627896.

It is an arithmetic number, because the mean of its divisors is an integer number (326627896).

Almost surely, 2^653255791 is an apocalyptic number.

653255791 is a deficient number, since it is larger than the sum of its proper divisors (1).

653255791 is an equidigital number, since it uses as much as digits as its factorization.

653255791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 283500, while the sum is 43.

The square root of 653255791 is about 25558.8691260001. The cubic root of 653255791 is about 867.6830015861.

The spelling of 653255791 in words is "six hundred fifty-three million, two hundred fifty-five thousand, seven hundred ninety-one".