490091 has 8 divisors (see below), whose sum is σ = 571104. Its totient is φ = 411840.

The previous prime is 490057. The next prime is 490097. The reversal of 490091 is 190094.

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 490091 - 2¹⁸ = 227947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490097) 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, 290 + ... + 1031.

It is an arithmetic number, because the mean of its divisors is an integer number (71388).

2⁴⁹⁰⁰⁹¹ is an apocalyptic number.

490091 is a deficient number, since it is larger than the sum of its proper divisors (81013).

490091 is a wasteful number, since it uses less digits than its factorization.

490091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 490091 is about 700.0649969824. The cubic root of 490091 is about 78.8422317364.

The spelling of 490091 in words is "four hundred ninety thousand, ninety-one".