998080817 has 2 divisors, whose sum is σ = 998080818. Its totient is φ = 998080816.

The previous prime is 998080813. The next prime is 998080847. The reversal of 998080817 is 718080899.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 556912801 + 441168016 = 23599^2 + 21004^2 .

It is a cyclic number.

It is not a de Polignac number, because 998080817 - 2² = 998080813 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998080813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499040408 + 499040409.

It is an arithmetic number, because the mean of its divisors is an integer number (499040409).

Almost surely, 2^998080817 is an apocalyptic number.

It is an amenable number.

998080817 is a deficient number, since it is larger than the sum of its proper divisors (1).

998080817 is an equidigital number, since it uses as much as digits as its factorization.

998080817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 50.

The square root of 998080817 is about 31592.4170806857. The cubic root of 998080817 is about 999.3598626449.

The spelling of 998080817 in words is "nine hundred ninety-eight million, eighty thousand, eight hundred seventeen".