99906723 has 32 divisors (see below), whose sum is σ = 169771520. Its totient is φ = 56881440.

The previous prime is 99906713. The next prime is 99906743. The reversal of 99906723 is 32760999.

It is not a de Polignac number, because 99906723 - 2⁵ = 99906691 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99906713) 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, 61761 + ... + 63357.

It is an arithmetic number, because the mean of its divisors is an integer number (5305360).

Almost surely, 2^99906723 is an apocalyptic number.

99906723 is a deficient number, since it is larger than the sum of its proper divisors (69864797).

99906723 is a wasteful number, since it uses less digits than its factorization.

99906723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944 (or 1938 counting only the distinct ones).

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

The square root of 99906723 is about 9995.3350619176. The cubic root of 99906723 is about 464.0145206390.

The spelling of 99906723 in words is "ninety-nine million, nine hundred six thousand, seven hundred twenty-three".