490820968109 has 2 divisors, whose sum is σ = 490820968110. Its totient is φ = 490820968108.

The previous prime is 490820968103. The next prime is 490820968133. The reversal of 490820968109 is 901869028094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 484246190884 + 6574777225 = 695878^2 + 81085^2 .

It is a cyclic number.

It is not a de Polignac number, because 490820968109 - 2²⁸ = 490552532653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490820968103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245410484054 + 245410484055.

It is an arithmetic number, because the mean of its divisors is an integer number (245410484055).

Almost surely, 2^490820968109 is an apocalyptic number.

It is an amenable number.

490820968109 is a deficient number, since it is larger than the sum of its proper divisors (1).

490820968109 is an equidigital number, since it uses as much as digits as its factorization.

490820968109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 56.

The spelling of 490820968109 in words is "four hundred ninety billion, eight hundred twenty million, nine hundred sixty-eight thousand, one hundred nine".