99687424 has 44 divisors (see below), whose sum is σ = 202390984. Its totient is φ = 49065984.

The previous prime is 99687421. The next prime is 99687437. The reversal of 99687424 is 42478699.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99687421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67882 + ... + 69334.

Almost surely, 2^99687424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99687424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101195492).

99687424 is an abundant number, since it is smaller than the sum of its proper divisors (102703560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99687424 is a wasteful number, since it uses less digits than its factorization.

99687424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 1522 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 99687424 is about 9984.3589679058. The cubic root of 99687424 is about 463.6747621711.

The spelling of 99687424 in words is "ninety-nine million, six hundred eighty-seven thousand, four hundred twenty-four".