498256813 has 2 divisors, whose sum is σ = 498256814. Its totient is φ = 498256812.

The previous prime is 498256739. The next prime is 498256819. The reversal of 498256813 is 318652894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 452923524 + 45333289 = 21282^2 + 6733^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-498256813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (498256819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249128406 + 249128407.

It is an arithmetic number, because the mean of its divisors is an integer number (249128407).

Almost surely, 2^498256813 is an apocalyptic number.

It is an amenable number.

498256813 is a deficient number, since it is larger than the sum of its proper divisors (1).

498256813 is an equidigital number, since it uses as much as digits as its factorization.

498256813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 46.

The square root of 498256813 is about 22321.6668956420. Note that the first 3 decimals coincide. The cubic root of 498256813 is about 792.7770730246. Note that the first 3 decimals are identical.

The spelling of 498256813 in words is "four hundred ninety-eight million, two hundred fifty-six thousand, eight hundred thirteen".