498869309 has 2 divisors, whose sum is σ = 498869310. Its totient is φ = 498869308.

The previous prime is 498869251. The next prime is 498869321. The reversal of 498869309 is 903968894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249545209 + 249324100 = 15797^2 + 15790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-498869309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (498869209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249434654 + 249434655.

It is an arithmetic number, because the mean of its divisors is an integer number (249434655).

Almost surely, 2^498869309 is an apocalyptic number.

It is an amenable number.

498869309 is a deficient number, since it is larger than the sum of its proper divisors (1).

498869309 is an equidigital number, since it uses as much as digits as its factorization.

498869309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The square root of 498869309 is about 22335.3824457966. The cubic root of 498869309 is about 793.1017877375.

It can be divided in two parts, 49886 and 9309, that added together give a palindrome (59195).

The spelling of 498869309 in words is "four hundred ninety-eight million, eight hundred sixty-nine thousand, three hundred nine".