4312309 has 2 divisors, whose sum is σ = 4312310. Its totient is φ = 4312308.

The previous prime is 4312291. The next prime is 4312331. The reversal of 4312309 is 9032134.

It is an a-pointer prime, because the next prime (4312331) can be obtained adding 4312309 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3496900 + 815409 = 1870^2 + 903^2 .

It is a cyclic number.

It is not a de Polignac number, because 4312309 - 2⁷ = 4312181 is a prime.

It is a super-2 number, since 2×4312309² = 37192017822962, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4312309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4342309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2156154 + 2156155.

It is an arithmetic number, because the mean of its divisors is an integer number (2156155).

Almost surely, 2^4312309 is an apocalyptic number.

It is an amenable number.

4312309 is a deficient number, since it is larger than the sum of its proper divisors (1).

4312309 is an equidigital number, since it uses as much as digits as its factorization.

4312309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 4312309 is about 2076.6099778244. The cubic root of 4312309 is about 162.7683487217.

The spelling of 4312309 in words is "four million, three hundred twelve thousand, three hundred nine".