99997447 has 8 divisors (see below), whose sum is σ = 110148480. Its totient is φ = 90023160.

The previous prime is 99997441. The next prime is 99997459. The reversal of 99997447 is 74479999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99997447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99997391 and 99997400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99997441) 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 7 ways as a sum of consecutive naturals, for example, 42997 + ... + 45262.

It is an arithmetic number, because the mean of its divisors is an integer number (13768560).

Almost surely, 2^99997447 is an apocalyptic number.

99997447 is a deficient number, since it is larger than the sum of its proper divisors (10151033).

99997447 is a wasteful number, since it uses less digits than its factorization.

99997447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88373.

The product of its digits is 5143824, while the sum is 58.

The square root of 99997447 is about 9999.8723491853. The cubic root of 99997447 is about 464.1549333356.

The spelling of 99997447 in words is "ninety-nine million, nine hundred ninety-seven thousand, four hundred forty-seven".