12307213 has 2 divisors, whose sum is σ = 12307214. Its totient is φ = 12307212.

The previous prime is 12307171. The next prime is 12307237. The reversal of 12307213 is 31270321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7628644 + 4678569 = 2762^2 + 2163^2 .

It is a cyclic number.

It is not a de Polignac number, because 12307213 - 2²¹ = 10210061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12307013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6153606 + 6153607.

It is an arithmetic number, because the mean of its divisors is an integer number (6153607).

Almost surely, 2^12307213 is an apocalyptic number.

It is an amenable number.

12307213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12307213 is an equidigital number, since it uses as much as digits as its factorization.

12307213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 12307213 is about 3508.1637647065. The cubic root of 12307213 is about 230.8801374623.

Adding to 12307213 its reverse (31270321), we get a palindrome (43577534).

The spelling of 12307213 in words is "twelve million, three hundred seven thousand, two hundred thirteen".