491952653 has 2 divisors, whose sum is σ = 491952654. Its totient is φ = 491952652.

The previous prime is 491952649. The next prime is 491952667. The reversal of 491952653 is 356259194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393506569 + 98446084 = 19837^2 + 9922^2 .

It is a cyclic number.

It is not a de Polignac number, because 491952653 - 2² = 491952649 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491952053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245976326 + 245976327.

It is an arithmetic number, because the mean of its divisors is an integer number (245976327).

Almost surely, 2^491952653 is an apocalyptic number.

It is an amenable number.

491952653 is a deficient number, since it is larger than the sum of its proper divisors (1).

491952653 is an equidigital number, since it uses as much as digits as its factorization.

491952653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 44.

The square root of 491952653 is about 22180.0057033356. The cubic root of 491952653 is about 789.4193527465.

The spelling of 491952653 in words is "four hundred ninety-one million, nine hundred fifty-two thousand, six hundred fifty-three".