99011623 has 4 divisors (see below), whose sum is σ = 99213768. Its totient is φ = 98809480.

The previous prime is 99011599. The next prime is 99011639. The reversal of 99011623 is 32611099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99011623 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99011663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100336 + ... + 101317.

It is an arithmetic number, because the mean of its divisors is an integer number (24803442).

Almost surely, 2^99011623 is an apocalyptic number.

99011623 is a deficient number, since it is larger than the sum of its proper divisors (202145).

99011623 is a wasteful number, since it uses less digits than its factorization.

99011623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202144.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 99011623 is about 9950.4584316503. The cubic root of 99011623 is about 462.6246041673.

The spelling of 99011623 in words is "ninety-nine million, eleven thousand, six hundred twenty-three".