312099 has 4 divisors (see below), whose sum is σ = 416136. Its totient is φ = 208064.

The previous prime is 312089. The next prime is 312101. The reversal of 312099 is 990213.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 312099 - 2⁴ = 312083 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312099.

It is not an unprimeable number, because it can be changed into a prime (312029) 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, 52014 + ... + 52019.

It is an arithmetic number, because the mean of its divisors is an integer number (104034).

2³¹²⁰⁹⁹ is an apocalyptic number.

312099 is a deficient number, since it is larger than the sum of its proper divisors (104037).

312099 is a wasteful number, since it uses less digits than its factorization.

312099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104036.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 312099 is about 558.6582139376. The cubic root of 312099 is about 67.8314018182.

The spelling of 312099 in words is "three hundred twelve thousand, ninety-nine".