491100823 has 8 divisors (see below), whose sum is σ = 498548736. Its totient is φ = 483667800.

The previous prime is 491100817. The next prime is 491100833. The reversal of 491100823 is 328001194.

It is a happy number.

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 491100823 - 2¹³ = 491092631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491100791 and 491100800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491100833) 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, 75178 + ... + 81448.

It is an arithmetic number, because the mean of its divisors is an integer number (62318592).

Almost surely, 2^491100823 is an apocalyptic number.

491100823 is a deficient number, since it is larger than the sum of its proper divisors (7447913).

491100823 is a wasteful number, since it uses less digits than its factorization.

491100823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7445.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 491100823 is about 22160.7947285290. The cubic root of 491100823 is about 788.9634554973.

The spelling of 491100823 in words is "four hundred ninety-one million, one hundred thousand, eight hundred twenty-three".