490191001 has 2 divisors, whose sum is σ = 490191002. Its totient is φ = 490191000.

The previous prime is 490190989. The next prime is 490191007. The reversal of 490191001 is 100191094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 325838601 + 164352400 = 18051^2 + 12820^2 .

It is a cyclic number.

It is not a de Polignac number, because 490191001 - 2⁷ = 490190873 is a prime.

It is a super-2 number, since 2×490191001² = 480574434922764002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (490191007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245095500 + 245095501.

It is an arithmetic number, because the mean of its divisors is an integer number (245095501).

Almost surely, 2^490191001 is an apocalyptic number.

It is an amenable number.

490191001 is a deficient number, since it is larger than the sum of its proper divisors (1).

490191001 is an equidigital number, since it uses as much as digits as its factorization.

490191001 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 25.

The square root of 490191001 is about 22140.2574736610. The cubic root of 490191001 is about 788.4759384663.

The spelling of 490191001 in words is "four hundred ninety million, one hundred ninety-one thousand, one".