491954697 has 12 divisors (see below), whose sum is σ = 765263044. Its totient is φ = 302741280.

The previous prime is 491954657. The next prime is 491954711. The reversal of 491954697 is 796459194.

It is a happy number.

491954697 is a `hidden beast` number, since 4 + 9 + 1 + 9 + 546 + 97 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 69405561 + 422549136 = 8331^2 + 20556^2 .

It is not a de Polignac number, because 491954697 - 2¹¹ = 491952649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491954647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2102254 + ... + 2102487.

Almost surely, 2^491954697 is an apocalyptic number.

It is an amenable number.

491954697 is a deficient number, since it is larger than the sum of its proper divisors (273308347).

491954697 is a wasteful number, since it uses less digits than its factorization.

491954697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4204760 (or 4204757 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 491954697 is about 22180.0517808232. The cubic root of 491954697 is about 789.4204460570.

The spelling of 491954697 in words is "four hundred ninety-one million, nine hundred fifty-four thousand, six hundred ninety-seven".