491633267 has 2 divisors, whose sum is σ = 491633268. Its totient is φ = 491633266.

The previous prime is 491633249. The next prime is 491633291. The reversal of 491633267 is 762336194.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491633267 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (491633237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245816633 + 245816634.

It is an arithmetic number, because the mean of its divisors is an integer number (245816634).

Almost surely, 2^491633267 is an apocalyptic number.

491633267 is a deficient number, since it is larger than the sum of its proper divisors (1).

491633267 is an equidigital number, since it uses as much as digits as its factorization.

491633267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 41.

The square root of 491633267 is about 22172.8046714889. The cubic root of 491633267 is about 789.2484798857.

It can be divided in two parts, 4916 and 33267, that added together give a palindrome (38183).

The spelling of 491633267 in words is "four hundred ninety-one million, six hundred thirty-three thousand, two hundred sixty-seven".