491405883 has 4 divisors (see below), whose sum is σ = 655207848. Its totient is φ = 327603920.

The previous prime is 491405861. The next prime is 491405891. The reversal of 491405883 is 388504194.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 491405883 - 2⁶ = 491405819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491455883) 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, 81900978 + ... + 81900983.

It is an arithmetic number, because the mean of its divisors is an integer number (163801962).

Almost surely, 2^491405883 is an apocalyptic number.

491405883 is a deficient number, since it is larger than the sum of its proper divisors (163801965).

491405883 is a wasteful number, since it uses less digits than its factorization.

491405883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163801964.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 491405883 is about 22167.6765358934. The cubic root of 491405883 is about 789.1267833807.

The spelling of 491405883 in words is "four hundred ninety-one million, four hundred five thousand, eight hundred eighty-three".