99909923 has 8 divisors (see below), whose sum is σ = 105336000. Its totient is φ = 94500648.

The previous prime is 99909919. The next prime is 99909947. The reversal of 99909923 is 32990999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99909923 - 2² = 99909919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99909973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9128 + ... + 16826.

It is an arithmetic number, because the mean of its divisors is an integer number (13167000).

Almost surely, 2^99909923 is an apocalyptic number.

99909923 is a deficient number, since it is larger than the sum of its proper divisors (5426077).

99909923 is a wasteful number, since it uses less digits than its factorization.

99909923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8401.

The product of its (nonzero) digits is 354294, while the sum is 50.

The square root of 99909923 is about 9995.4951353097. The cubic root of 99909923 is about 464.0194746954.

The spelling of 99909923 in words is "ninety-nine million, nine hundred nine thousand, nine hundred twenty-three".