99689898 has 64 divisors (see below), whose sum is σ = 250398720. Its totient is φ = 25704000.

The previous prime is 99689897. The next prime is 99689899. The reversal of 99689898 is 89898699.

It is an interprime number because it is at equal distance from previous prime (99689897) and next prime (99689899).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (99689897) 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, 69048 + ... + 70476.

It is an arithmetic number, because the mean of its divisors is an integer number (3912480).

Almost surely, 2^99689898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99689898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125199360).

99689898 is an abundant number, since it is smaller than the sum of its proper divisors (150708822).

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

99689898 is a wasteful number, since it uses less digits than its factorization.

99689898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603.

The product of its digits is 20155392, while the sum is 66.

The square root of 99689898 is about 9984.4828609197. The cubic root of 99689898 is about 463.6785979002.

The spelling of 99689898 in words is "ninety-nine million, six hundred eighty-nine thousand, eight hundred ninety-eight".