102099 has 4 divisors (see below), whose sum is σ = 136136. Its totient is φ = 68064.

The previous prime is 102079. The next prime is 102101. The reversal of 102099 is 990201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 990201 = 3 ⋅330067.

It is not a de Polignac number, because 102099 - 2¹⁶ = 36563 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102019) 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, 17014 + ... + 17019.

It is an arithmetic number, because the mean of its divisors is an integer number (34034).

2¹⁰²⁰⁹⁹ is an apocalyptic number.

102099 is a deficient number, since it is larger than the sum of its proper divisors (34037).

102099 is an equidigital number, since it uses as much as digits as its factorization.

102099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34036.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 102099 is about 319.5293413757. The cubic root of 102099 is about 46.7383987533.

The spelling of 102099 in words is "one hundred two thousand, ninety-nine".