99998447 has 2 divisors, whose sum is σ = 99998448. Its totient is φ = 99998446.

The previous prime is 99998441. The next prime is 99998449. The reversal of 99998447 is 74489999.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99998447 - 2⁸ = 99998191 is a prime.

Together with 99998449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99998441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999223 + 49999224.

It is an arithmetic number, because the mean of its divisors is an integer number (49999224).

Almost surely, 2^99998447 is an apocalyptic number.

99998447 is a deficient number, since it is larger than the sum of its proper divisors (1).

99998447 is an equidigital number, since it uses as much as digits as its factorization.

99998447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The square root of 99998447 is about 9999.9223496985. The cubic root of 99998447 is about 464.1564805530.

The spelling of 99998447 in words is "ninety-nine million, nine hundred ninety-eight thousand, four hundred forty-seven".