99001 has 4 divisors (see below), whose sum is σ = 113152. Its totient is φ = 84852.

The previous prime is 98999. The next prime is 99013. The reversal of 99001 is 10099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99001 - 2¹ = 98999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99001.

It is not an unprimeable number, because it can be changed into a prime (99041) 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, 7065 + ... + 7078.

It is an arithmetic number, because the mean of its divisors is an integer number (28288).

2⁹⁹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

99001 is a deficient number, since it is larger than the sum of its proper divisors (14151).

99001 is a wasteful number, since it uses less digits than its factorization.

99001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14150.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 99001 is about 314.6442435513. The cubic root of 99001 is about 46.2608058511.

The spelling of 99001 in words is "ninety-nine thousand, one".