1223312137 has 2 divisors, whose sum is σ = 1223312138. Its totient is φ = 1223312136.

The previous prime is 1223312119. The next prime is 1223312143. The reversal of 1223312137 is 7312133221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 853749961 + 369562176 = 29219^2 + 19224^2 .

It is an emirp because it is prime and its reverse (7312133221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223312137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223312107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611656068 + 611656069.

It is an arithmetic number, because the mean of its divisors is an integer number (611656069).

Almost surely, 2^1223312137 is an apocalyptic number.

It is an amenable number.

1223312137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223312137 is an equidigital number, since it uses as much as digits as its factorization.

1223312137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 25.

The square root of 1223312137 is about 34975.8793599246. The cubic root of 1223312137 is about 1069.4958282181.

Adding to 1223312137 its reverse (7312133221), we get a palindrome (8535445358).

The spelling of 1223312137 in words is "one billion, two hundred twenty-three million, three hundred twelve thousand, one hundred thirty-seven".