491010173 has 4 divisors (see below), whose sum is σ = 494262048. Its totient is φ = 487758300.

The previous prime is 491010161. The next prime is 491010197. The reversal of 491010173 is 371010194.

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 491010173 - 2⁶ = 491010109 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 (491010973) 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, 1625711 + ... + 1626012.

It is an arithmetic number, because the mean of its divisors is an integer number (123565512).

Almost surely, 2^491010173 is an apocalyptic number.

It is an amenable number.

491010173 is a deficient number, since it is larger than the sum of its proper divisors (3251875).

491010173 is a wasteful number, since it uses less digits than its factorization.

491010173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3251874.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 491010173 is about 22158.7493555029. The cubic root of 491010173 is about 788.9149088209.

The spelling of 491010173 in words is "four hundred ninety-one million, ten thousand, one hundred seventy-three".