998556113 has 2 divisors, whose sum is σ = 998556114. Its totient is φ = 998556112.

The previous prime is 998556089. The next prime is 998556127. The reversal of 998556113 is 311655899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 938074384 + 60481729 = 30628^2 + 7777^2 .

It is a cyclic number.

It is not a de Polignac number, because 998556113 - 2⁶ = 998556049 is a prime.

It is a super-2 number, since 2×998556113² = 1994228621619337538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (998556133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499278056 + 499278057.

It is an arithmetic number, because the mean of its divisors is an integer number (499278057).

Almost surely, 2^998556113 is an apocalyptic number.

It is an amenable number.

998556113 is a deficient number, since it is larger than the sum of its proper divisors (1).

998556113 is an equidigital number, since it uses as much as digits as its factorization.

998556113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 47.

The square root of 998556113 is about 31599.9384967756. The cubic root of 998556113 is about 999.5184725018.

The spelling of 998556113 in words is "nine hundred ninety-eight million, five hundred fifty-six thousand, one hundred thirteen".