491632633 has 2 divisors, whose sum is σ = 491632634. Its totient is φ = 491632632.

The previous prime is 491632601. The next prime is 491632637. The reversal of 491632633 is 336236194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304572304 + 187060329 = 17452^2 + 13677^2 .

It is a cyclic number.

It is not a de Polignac number, because 491632633 - 2⁵ = 491632601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491632592 and 491632601.

It is not a weakly prime, because it can be changed into another prime (491632637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245816316 + 245816317.

It is an arithmetic number, because the mean of its divisors is an integer number (245816317).

Almost surely, 2^491632633 is an apocalyptic number.

It is an amenable number.

491632633 is a deficient number, since it is larger than the sum of its proper divisors (1).

491632633 is an equidigital number, since it uses as much as digits as its factorization.

491632633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 37.

The square root of 491632633 is about 22172.7903746912. The cubic root of 491632633 is about 789.2481406194.

The spelling of 491632633 in words is "four hundred ninety-one million, six hundred thirty-two thousand, six hundred thirty-three".