491322797 has 8 divisors (see below), whose sum is σ = 594542016. Its totient is φ = 396361152.

The previous prime is 491322791. The next prime is 491322817. The reversal of 491322797 is 797223194.

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 491322797 - 2⁸ = 491322541 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 (491322791) 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, 2064263 + ... + 2064500.

It is an arithmetic number, because the mean of its divisors is an integer number (74317752).

Almost surely, 2^491322797 is an apocalyptic number.

It is an amenable number.

491322797 is a deficient number, since it is larger than the sum of its proper divisors (103219219).

491322797 is a wasteful number, since it uses less digits than its factorization.

491322797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128787.

The product of its digits is 190512, while the sum is 44.

The square root of 491322797 is about 22165.8024217487. The cubic root of 491322797 is about 789.0823061737.

The spelling of 491322797 in words is "four hundred ninety-one million, three hundred twenty-two thousand, seven hundred ninety-seven".