312097 has 4 divisors (see below), whose sum is σ = 313236. Its totient is φ = 310960.

The previous prime is 312089. The next prime is 312101. The reversal of 312097 is 790213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 790213 = 503 ⋅1571.

It can be written as a sum of positive squares in 2 ways, for example, as 234256 + 77841 = 484^2 + 279^2 .

It is a cyclic number.

It is not a de Polignac number, because 312097 - 2³ = 312089 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123 + ... + 799.

It is an arithmetic number, because the mean of its divisors is an integer number (78309).

2³¹²⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

312097 is a deficient number, since it is larger than the sum of its proper divisors (1139).

312097 is an equidigital number, since it uses as much as digits as its factorization.

312097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 312097 is about 558.6564239316. The cubic root of 312097 is about 67.8312569249.

It can be divided in two parts, 3 and 12097, that added together give a square (12100 = 110²).

The spelling of 312097 in words is "three hundred twelve thousand, ninety-seven".