998626841 has 2 divisors, whose sum is σ = 998626842. Its totient is φ = 998626840.

The previous prime is 998626823. The next prime is 998626847. The reversal of 998626841 is 148626899.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 975625225 + 23001616 = 31235^2 + 4796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998626841 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (998626847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499313420 + 499313421.

It is an arithmetic number, because the mean of its divisors is an integer number (499313421).

Almost surely, 2^998626841 is an apocalyptic number.

It is an amenable number.

998626841 is a deficient number, since it is larger than the sum of its proper divisors (1).

998626841 is an equidigital number, since it uses as much as digits as its factorization.

998626841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 53.

The square root of 998626841 is about 31601.0575930617. The cubic root of 998626841 is about 999.5420706661.

The spelling of 998626841 in words is "nine hundred ninety-eight million, six hundred twenty-six thousand, eight hundred forty-one".