498660826921 has 2 divisors, whose sum is σ = 498660826922. Its totient is φ = 498660826920.

The previous prime is 498660826877. The next prime is 498660826967. The reversal of 498660826921 is 129628066894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451859562025 + 46801264896 = 672205^2 + 216336^2 .

It is a cyclic number.

It is not a de Polignac number, because 498660826921 - 2¹⁹ = 498660302633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 498660826921.

It is not a weakly prime, because it can be changed into another prime (498660826121) 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, 249330413460 + 249330413461.

It is an arithmetic number, because the mean of its divisors is an integer number (249330413461).

Almost surely, 2^498660826921 is an apocalyptic number.

It is an amenable number.

498660826921 is a deficient number, since it is larger than the sum of its proper divisors (1).

498660826921 is an equidigital number, since it uses as much as digits as its factorization.

498660826921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 498660826921 in words is "four hundred ninety-eight billion, six hundred sixty million, eight hundred twenty-six thousand, nine hundred twenty-one".