312199 has 2 divisors, whose sum is σ = 312200. Its totient is φ = 312198.

The previous prime is 312197. The next prime is 312203. The reversal of 312199 is 991213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312199 - 2¹ = 312197 is a prime.

Together with 312197, it forms a pair of twin primes.

312199 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312199.

It is not a weakly prime, because it can be changed into another prime (312197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156099 + 156100.

It is an arithmetic number, because the mean of its divisors is an integer number (156100).

2³¹²¹⁹⁹ is an apocalyptic number.

312199 is a deficient number, since it is larger than the sum of its proper divisors (1).

312199 is an equidigital number, since it uses as much as digits as its factorization.

312199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 25.

The square root of 312199 is about 558.7477069304. The cubic root of 312199 is about 67.8386456904.

The spelling of 312199 in words is "three hundred twelve thousand, one hundred ninety-nine".