494931637 has 2 divisors, whose sum is σ = 494931638. Its totient is φ = 494931636.

The previous prime is 494931629. The next prime is 494931691. The reversal of 494931637 is 736139494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 493106436 + 1825201 = 22206^2 + 1351^2 .

It is a cyclic number.

It is not a de Polignac number, because 494931637 - 2³ = 494931629 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494931607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247465818 + 247465819.

It is an arithmetic number, because the mean of its divisors is an integer number (247465819).

Almost surely, 2^494931637 is an apocalyptic number.

It is an amenable number.

494931637 is a deficient number, since it is larger than the sum of its proper divisors (1).

494931637 is an equidigital number, since it uses as much as digits as its factorization.

494931637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 46.

The square root of 494931637 is about 22247.0590640651. The cubic root of 494931637 is about 791.0095713218.

The spelling of 494931637 in words is "four hundred ninety-four million, nine hundred thirty-one thousand, six hundred thirty-seven".