99445447 has 4 divisors (see below), whose sum is σ = 99841896. Its totient is φ = 99049000.

The previous prime is 99445441. The next prime is 99445453. The reversal of 99445447 is 74454499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74454499 = 7 ⋅10636357.

It is an interprime number because it is at equal distance from previous prime (99445441) and next prime (99445453).

It is a cyclic number.

It is not a de Polignac number, because 99445447 - 2³ = 99445439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99445397 and 99445406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99445441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197848 + ... + 198349.

It is an arithmetic number, because the mean of its divisors is an integer number (24960474).

Almost surely, 2^99445447 is an apocalyptic number.

99445447 is a deficient number, since it is larger than the sum of its proper divisors (396449).

99445447 is a wasteful number, since it uses less digits than its factorization.

99445447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396448.

The product of its digits is 725760, while the sum is 46.

The square root of 99445447 is about 9972.2338019122. The cubic root of 99445447 is about 463.2992900934.

The spelling of 99445447 in words is "ninety-nine million, four hundred forty-five thousand, four hundred forty-seven".