99673812 has 144 divisors (see below), whose sum is σ = 311351040. Its totient is φ = 26256384.

The previous prime is 99673807. The next prime is 99673813. The reversal of 99673812 is 21837699.

It is a super-2 number, since 2×99673812² = 19869737597222688, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99673813) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 167788 + ... + 168380.

It is an arithmetic number, because the mean of its divisors is an integer number (2162160).

Almost surely, 2^99673812 is an apocalyptic number.

99673812 is a gapful number since it is divisible by the number (92) 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 99673812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155675520).

99673812 is an abundant number, since it is smaller than the sum of its proper divisors (211677228).

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

99673812 is a wasteful number, since it uses less digits than its factorization.

99673812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 657 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 99673812 is about 9983.6772784380. The cubic root of 99673812 is about 463.6536567735.

The spelling of 99673812 in words is "ninety-nine million, six hundred seventy-three thousand, eight hundred twelve".