99693720 has 128 divisors (see below), whose sum is σ = 379814400. Its totient is φ = 22785408.

The previous prime is 99693697. The next prime is 99693733. The reversal of 99693720 is 2739699.

It is a super-3 number, since 3×99693720³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 967 + ... + 14153.

It is an arithmetic number, because the mean of its divisors is an integer number (2967300).

Almost surely, 2^99693720 is an apocalyptic number.

99693720 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 99693720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189907200).

99693720 is an abundant number, since it is smaller than the sum of its proper divisors (280120680).

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

99693720 is a wasteful number, since it uses less digits than its factorization.

99693720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13214 (or 13204 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 99693720 is about 9984.6742560787. The cubic root of 99693720 is about 463.6845234653.

It can be divided in two parts, 9969 and 3720, that added together give a square (13689 = 117²).

The spelling of 99693720 in words is "ninety-nine million, six hundred ninety-three thousand, seven hundred twenty".