490931591 has 8 divisors (see below), whose sum is σ = 503984064. Its totient is φ = 477987840.

The previous prime is 490931561. The next prime is 490931603. The reversal of 490931591 is 195139094.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-490931591 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 (490931501) 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 7 ways as a sum of consecutive naturals, for example, 17990 + ... + 36131.

It is an arithmetic number, because the mean of its divisors is an integer number (62998008).

Almost surely, 2^490931591 is an apocalyptic number.

490931591 is a deficient number, since it is larger than the sum of its proper divisors (13052473).

490931591 is a wasteful number, since it uses less digits than its factorization.

490931591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54361.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 490931591 is about 22156.9761249138. The cubic root of 490931591 is about 788.8728202029.

The spelling of 490931591 in words is "four hundred ninety million, nine hundred thirty-one thousand, five hundred ninety-one".