491468239 has 2 divisors, whose sum is σ = 491468240. Its totient is φ = 491468238.

The previous prime is 491468233. The next prime is 491468273. The reversal of 491468239 is 932864194.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491468239 is a prime.

It is a super-2 number, since 2×491468239² = 483082059891522242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491468233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245734119 + 245734120.

It is an arithmetic number, because the mean of its divisors is an integer number (245734120).

Almost surely, 2^491468239 is an apocalyptic number.

491468239 is a deficient number, since it is larger than the sum of its proper divisors (1).

491468239 is an equidigital number, since it uses as much as digits as its factorization.

491468239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The square root of 491468239 is about 22169.0829535188. The cubic root of 491468239 is about 789.1601602084.

It can be divided in two parts, 4914 and 68239, that added together give a triangular number (73153 = T₃₈₂).

The spelling of 491468239 in words is "four hundred ninety-one million, four hundred sixty-eight thousand, two hundred thirty-nine".