491895423 has 12 divisors (see below), whose sum is σ = 736831368. Its totient is φ = 327930120.

The previous prime is 491895413. The next prime is 491895451. The reversal of 491895423 is 324598194.

491895423 is a `hidden beast` number, since 49 + 189 + 5 + 423 = 666.

It is not a de Polignac number, because 491895423 - 2⁶ = 491895359 is a prime.

It is a super-2 number, since 2×491895423² = 483922214336697858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491895413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1011888 + ... + 1012373.

It is an arithmetic number, because the mean of its divisors is an integer number (61402614).

Almost surely, 2^491895423 is an apocalyptic number.

491895423 is a deficient number, since it is larger than the sum of its proper divisors (244935945).

491895423 is an equidigital number, since it uses as much as digits as its factorization.

491895423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024276 (or 2024264 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 491895423 is about 22178.7155399045. The cubic root of 491895423 is about 789.3887398943.

The spelling of 491895423 in words is "four hundred ninety-one million, eight hundred ninety-five thousand, four hundred twenty-three".