491111247 has 8 divisors (see below), whose sum is σ = 714343680. Its totient is φ = 297643160.

The previous prime is 491111237. The next prime is 491111251. The reversal of 491111247 is 742111194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491111247 - 2⁷ = 491111119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491111227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7441047 + ... + 7441112.

It is an arithmetic number, because the mean of its divisors is an integer number (89292960).

Almost surely, 2^491111247 is an apocalyptic number.

491111247 is a deficient number, since it is larger than the sum of its proper divisors (223232433).

491111247 is a wasteful number, since it uses less digits than its factorization.

491111247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14882173.

The product of its digits is 2016, while the sum is 30.

The square root of 491111247 is about 22161.0299174023. The cubic root of 491111247 is about 788.9690375804.

The spelling of 491111247 in words is "four hundred ninety-one million, one hundred eleven thousand, two hundred forty-seven".