99291447 has 32 divisors (see below), whose sum is σ = 153259200. Its totient is φ = 63455616.

The previous prime is 99291443. The next prime is 99291457. The reversal of 99291447 is 74419299.

It is a happy number.

It is not a de Polignac number, because 99291447 - 2² = 99291443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99291443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135093 + ... + 135825.

It is an arithmetic number, because the mean of its divisors is an integer number (4789350).

Almost surely, 2^99291447 is an apocalyptic number.

99291447 is a deficient number, since it is larger than the sum of its proper divisors (53967753).

99291447 is a wasteful number, since it uses less digits than its factorization.

99291447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944 (or 938 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 99291447 is about 9964.5093707618. The cubic root of 99291447 is about 463.0600133371.

The spelling of 99291447 in words is "ninety-nine million, two hundred ninety-one thousand, four hundred forty-seven".