491359822 has 4 divisors (see below), whose sum is σ = 737039736. Its totient is φ = 245679910.

The previous prime is 491359801. The next prime is 491359829. The reversal of 491359822 is 228953194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 228953194 = 2 ⋅114476597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491359829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122839954 + ... + 122839957.

It is an arithmetic number, because the mean of its divisors is an integer number (184259934).

Almost surely, 2^491359822 is an apocalyptic number.

491359822 is a deficient number, since it is larger than the sum of its proper divisors (245679914).

491359822 is a wasteful number, since it uses less digits than its factorization.

491359822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245679913.

The product of its digits is 155520, while the sum is 43.

The square root of 491359822 is about 22166.6375889534. The cubic root of 491359822 is about 789.1021268420.

The spelling of 491359822 in words is "four hundred ninety-one million, three hundred fifty-nine thousand, eight hundred twenty-two".