653900491 has 2 divisors, whose sum is σ = 653900492. Its totient is φ = 653900490.

The previous prime is 653900479. The next prime is 653900531. The reversal of 653900491 is 194009356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 653900491 - 2²³ = 645511883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 653900491.

It is not a weakly prime, because it can be changed into another prime (653901491) 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, 326950245 + 326950246.

It is an arithmetic number, because the mean of its divisors is an integer number (326950246).

Almost surely, 2^653900491 is an apocalyptic number.

653900491 is a deficient number, since it is larger than the sum of its proper divisors (1).

653900491 is an equidigital number, since it uses as much as digits as its factorization.

653900491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 653900491 is about 25571.4780761692. The cubic root of 653900491 is about 867.9683473454.

The spelling of 653900491 in words is "six hundred fifty-three million, nine hundred thousand, four hundred ninety-one".