2306309 has 2 divisors, whose sum is σ = 2306310. Its totient is φ = 2306308.

The previous prime is 2306303. The next prime is 2306327. The reversal of 2306309 is 9036032.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1682209 + 624100 = 1297^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2306309 - 2⁸ = 2306053 is a prime.

It is a super-2 number, since 2×2306309² = 10638122406962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2306303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1153154 + 1153155.

It is an arithmetic number, because the mean of its divisors is an integer number (1153155).

2^2306309 is an apocalyptic number.

It is an amenable number.

2306309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2306309 is an equidigital number, since it uses as much as digits as its factorization.

2306309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 2306309 is about 1518.6536800732. The cubic root of 2306309 is about 132.1211964635.

The spelling of 2306309 in words is "two million, three hundred six thousand, three hundred nine".