99957447 has 12 divisors (see below), whose sum is σ = 144789840. Its totient is φ = 66450528.

The previous prime is 99957443. The next prime is 99957449. The reversal of 99957447 is 74475999.

It is not a de Polignac number, because 99957447 - 2² = 99957443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99957393 and 99957402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99957443) 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 11 ways as a sum of consecutive naturals, for example, 12238 + ... + 18699.

It is an arithmetic number, because the mean of its divisors is an integer number (12065820).

Almost surely, 2^99957447 is an apocalyptic number.

99957447 is a deficient number, since it is larger than the sum of its proper divisors (44832393).

99957447 is a wasteful number, since it uses less digits than its factorization.

99957447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31302 (or 31299 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 99957447 is about 9997.8721236071. The cubic root of 99957447 is about 464.0930361772.

The spelling of 99957447 in words is "ninety-nine million, nine hundred fifty-seven thousand, four hundred forty-seven".