491117 has 4 divisors (see below), whose sum is σ = 535776. Its totient is φ = 446460.

The previous prime is 491083. The next prime is 491129. The reversal of 491117 is 711194.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 491117 - 2¹² = 487021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491092 and 491101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22313 + ... + 22334.

It is an arithmetic number, because the mean of its divisors is an integer number (133944).

2⁴⁹¹¹¹⁷ is an apocalyptic number.

It is an amenable number.

491117 is a deficient number, since it is larger than the sum of its proper divisors (44659).

491117 is a wasteful number, since it uses less digits than its factorization.

491117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44658.

The product of its digits is 252, while the sum is 23.

The square root of 491117 is about 700.7974029632. The cubic root of 491117 is about 78.8972118295.

The spelling of 491117 in words is "four hundred ninety-one thousand, one hundred seventeen".