99944447 has 2 divisors, whose sum is σ = 99944448. Its totient is φ = 99944446.

The previous prime is 99944443. The next prime is 99944459. The reversal of 99944447 is 74444999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99944447 - 2² = 99944443 is a prime.

It is a super-2 number, since 2×99944447² = 19977784972271618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99944395 and 99944404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99944441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49972223 + 49972224.

It is an arithmetic number, because the mean of its divisors is an integer number (49972224).

Almost surely, 2^99944447 is an apocalyptic number.

99944447 is a deficient number, since it is larger than the sum of its proper divisors (1).

99944447 is an equidigital number, since it uses as much as digits as its factorization.

99944447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 50.

The square root of 99944447 is about 9997.2219641258. The cubic root of 99944447 is about 464.0729160453.

It can be divided in two parts, 9994 and 4447, that added together give a palindrome (14441).

The spelling of 99944447 in words is "ninety-nine million, nine hundred forty-four thousand, four hundred forty-seven".