312269 has 2 divisors, whose sum is σ = 312270. Its totient is φ = 312268.

The previous prime is 312253. The next prime is 312281. The reversal of 312269 is 962213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198025 + 114244 = 445^2 + 338^2 .

It is a cyclic number.

It is not a de Polignac number, because 312269 - 2⁴ = 312253 is a prime.

It is a super-2 number, since 2×312269² = 195023856722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156134 + 156135.

It is an arithmetic number, because the mean of its divisors is an integer number (156135).

2³¹²²⁶⁹ is an apocalyptic number.

It is an amenable number.

312269 is a deficient number, since it is larger than the sum of its proper divisors (1).

312269 is an equidigital number, since it uses as much as digits as its factorization.

312269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 312269 is about 558.8103434977. The cubic root of 312269 is about 67.8437154807.

The spelling of 312269 in words is "three hundred twelve thousand, two hundred sixty-nine".