99424891 has 8 divisors (see below), whose sum is σ = 110814480. Its totient is φ = 88651008.

The previous prime is 99424889. The next prime is 99424907. The reversal of 99424891 is 19842499.

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

It is a cyclic number.

It is not a de Polignac number, because 99424891 - 2¹ = 99424889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99424861) 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, 153586 + ... + 154231.

It is an arithmetic number, because the mean of its divisors is an integer number (13851810).

Almost surely, 2^99424891 is an apocalyptic number.

99424891 is a deficient number, since it is larger than the sum of its proper divisors (11389589).

99424891 is a wasteful number, since it uses less digits than its factorization.

99424891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307853.

The product of its digits is 186624, while the sum is 46.

The square root of 99424891 is about 9971.2030868898. The cubic root of 99424891 is about 463.2673656003.

It can be divided in two parts, 9 and 9424891, that added together give a square (9424900 = 3070²).

The spelling of 99424891 in words is "ninety-nine million, four hundred twenty-four thousand, eight hundred ninety-one".