491675237 has 2 divisors, whose sum is σ = 491675238. Its totient is φ = 491675236.

The previous prime is 491675227. The next prime is 491675243. The reversal of 491675237 is 732576194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487570561 + 4104676 = 22081^2 + 2026^2 .

It is a cyclic number.

It is not a de Polignac number, because 491675237 - 2²⁸ = 223239781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491675227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245837618 + 245837619.

It is an arithmetic number, because the mean of its divisors is an integer number (245837619).

Almost surely, 2^491675237 is an apocalyptic number.

It is an amenable number.

491675237 is a deficient number, since it is larger than the sum of its proper divisors (1).

491675237 is an equidigital number, since it uses as much as digits as its factorization.

491675237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 44.

The square root of 491675237 is about 22173.7510809515. The cubic root of 491675237 is about 789.2709382358.

The spelling of 491675237 in words is "four hundred ninety-one million, six hundred seventy-five thousand, two hundred thirty-seven".