99217080 has 96 divisors (see below), whose sum is σ = 324324000. Its totient is φ = 26304768.

The previous prime is 99217067. The next prime is 99217087. The reversal of 99217080 is 8071299.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99217087) 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 23 ways as a sum of consecutive naturals, for example, 70221 + ... + 71619.

It is an arithmetic number, because the mean of its divisors is an integer number (3378375).

Almost surely, 2^99217080 is an apocalyptic number.

99217080 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99217080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162162000).

99217080 is an abundant number, since it is smaller than the sum of its proper divisors (225106920).

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

99217080 is a wasteful number, since it uses less digits than its factorization.

99217080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613 (or 1606 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 99217080 is about 9960.7770781200. Note that the first 3 decimals coincide. The cubic root of 99217080 is about 462.9443773785.

The spelling of 99217080 in words is "ninety-nine million, two hundred seventeen thousand, eighty".