900491 has 2 divisors, whose sum is σ = 900492. Its totient is φ = 900490.

The previous prime is 900481. The next prime is 900511. The reversal of 900491 is 194009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 900491 - 2¹⁰ = 899467 is a prime.

It is not a weakly prime, because it can be changed into another prime (900461) 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 as a sum of consecutive naturals, namely, 450245 + 450246.

It is an arithmetic number, because the mean of its divisors is an integer number (450246).

2⁹⁰⁰⁴⁹¹ is an apocalyptic number.

900491 is a deficient number, since it is larger than the sum of its proper divisors (1).

900491 is an equidigital number, since it uses as much as digits as its factorization.

900491 is an odious number, because the sum of its binary digits is odd.

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

The square root of 900491 is about 948.9420424873. The cubic root of 900491 is about 96.5664928719.

The spelling of 900491 in words is "nine hundred thousand, four hundred ninety-one".