498921697 has 2 divisors, whose sum is σ = 498921698. Its totient is φ = 498921696.

The previous prime is 498921677. The next prime is 498921737. The reversal of 498921697 is 796129894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283888801 + 215032896 = 16849^2 + 14664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-498921697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (498921607) 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, 249460848 + 249460849.

It is an arithmetic number, because the mean of its divisors is an integer number (249460849).

Almost surely, 2^498921697 is an apocalyptic number.

It is an amenable number.

498921697 is a deficient number, since it is larger than the sum of its proper divisors (1).

498921697 is an equidigital number, since it uses as much as digits as its factorization.

498921697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 498921697 is about 22336.5551730789. Note that the first 3 decimals coincide. The cubic root of 498921697 is about 793.1295488908.

The spelling of 498921697 in words is "four hundred ninety-eight million, nine hundred twenty-one thousand, six hundred ninety-seven".