491079361 has 4 divisors (see below), whose sum is σ = 499402800. Its totient is φ = 482755924.

The previous prime is 491079319. The next prime is 491079367. The reversal of 491079361 is 163970194.

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, and also an emirpimes, since its reverse is a distinct semiprime: 163970194 = 2 ⋅81985097.

It is a cyclic number.

It is not a de Polignac number, because 491079361 - 2⁹ = 491078849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491079367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4161631 + ... + 4161748.

It is an arithmetic number, because the mean of its divisors is an integer number (124850700).

Almost surely, 2^491079361 is an apocalyptic number.

It is an amenable number.

491079361 is a deficient number, since it is larger than the sum of its proper divisors (8323439).

491079361 is an equidigital number, since it uses as much as digits as its factorization.

491079361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8323438.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 491079361 is about 22160.3104897021. The cubic root of 491079361 is about 788.9519622835.

The spelling of 491079361 in words is "four hundred ninety-one million, seventy-nine thousand, three hundred sixty-one".