491265369 has 24 divisors (see below), whose sum is σ = 811729152. Its totient is φ = 280463040.

The previous prime is 491265331. The next prime is 491265407. The reversal of 491265369 is 963562194.

491265369 is a `hidden beast` number, since 4 + 91 + 26 + 536 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (491265331) and next prime (491265407).

It is not a de Polignac number, because 491265369 - 2¹¹ = 491263321 is a prime.

It is a super-2 number, since 2×491265369² = 482683325557412322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491265319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80272 + ... + 86174.

It is an arithmetic number, because the mean of its divisors is an integer number (33822048).

Almost surely, 2^491265369 is an apocalyptic number.

It is an amenable number.

491265369 is a deficient number, since it is larger than the sum of its proper divisors (320463783).

491265369 is a wasteful number, since it uses less digits than its factorization.

491265369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7237 (or 7234 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 491265369 is about 22164.5069649654. The cubic root of 491265369 is about 789.0515611559.

The spelling of 491265369 in words is "four hundred ninety-one million, two hundred sixty-five thousand, three hundred sixty-nine".