491194729 has 4 divisors (see below), whose sum is σ = 491314320. Its totient is φ = 491075140.

The previous prime is 491194727. The next prime is 491194733. The reversal of 491194729 is 927491194.

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 491194729 - 2¹ = 491194727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491194727) 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, 53407 + ... + 61924.

It is an arithmetic number, because the mean of its divisors is an integer number (122828580).

Almost surely, 2^491194729 is an apocalyptic number.

It is an amenable number.

491194729 is a deficient number, since it is larger than the sum of its proper divisors (119591).

491194729 is a wasteful number, since it uses less digits than its factorization.

491194729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119590.

The product of its digits is 163296, while the sum is 46.

The square root of 491194729 is about 22162.9133689594. The cubic root of 491194729 is about 789.0137395917.

The spelling of 491194729 in words is "four hundred ninety-one million, one hundred ninety-four thousand, seven hundred twenty-nine".