491897941 has 24 divisors (see below), whose sum is σ = 558258624. Its totient is φ = 432284160.

The previous prime is 491897921. The next prime is 491897947. The reversal of 491897941 is 149798194.

It is not a de Polignac number, because 491897941 - 2¹⁵ = 491865173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491897947) 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, 284961 + ... + 286681.

It is an arithmetic number, because the mean of its divisors is an integer number (23260776).

Almost surely, 2^491897941 is an apocalyptic number.

It is an amenable number.

491897941 is a deficient number, since it is larger than the sum of its proper divisors (66360683).

491897941 is a wasteful number, since it uses less digits than its factorization.

491897941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1804 counting only the distinct ones).

The product of its digits is 653184, while the sum is 52.

The square root of 491897941 is about 22178.7723059686. The cubic root of 491897941 is about 789.3900868456.

The spelling of 491897941 in words is "four hundred ninety-one million, eight hundred ninety-seven thousand, nine hundred forty-one".