998441623 has 2 divisors, whose sum is σ = 998441624. Its totient is φ = 998441622.

The previous prime is 998441599. The next prime is 998441663. The reversal of 998441623 is 326144899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998441623 - 2⁹ = 998441111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998441663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499220811 + 499220812.

It is an arithmetic number, because the mean of its divisors is an integer number (499220812).

Almost surely, 2^998441623 is an apocalyptic number.

998441623 is a deficient number, since it is larger than the sum of its proper divisors (1).

998441623 is an equidigital number, since it uses as much as digits as its factorization.

998441623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The square root of 998441623 is about 31598.1268906877. The cubic root of 998441623 is about 999.4802709285.

The spelling of 998441623 in words is "nine hundred ninety-eight million, four hundred forty-one thousand, six hundred twenty-three".