1123213237 has 2 divisors, whose sum is σ = 1123213238. Its totient is φ = 1123213236.

The previous prime is 1123213213. The next prime is 1123213241. The reversal of 1123213237 is 7323123211.

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., 1099651921 + 23561316 = 33161^2 + 4854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123213237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123211237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561606618 + 561606619.

It is an arithmetic number, because the mean of its divisors is an integer number (561606619).

Almost surely, 2^1123213237 is an apocalyptic number.

It is an amenable number.

1123213237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123213237 is an equidigital number, since it uses as much as digits as its factorization.

1123213237 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1123213237 is about 33514.3735880592. The cubic root of 1123213237 is about 1039.4910098713.

Adding to 1123213237 its reverse (7323123211), we get a palindrome (8446336448).

The spelling of 1123213237 in words is "one billion, one hundred twenty-three million, two hundred thirteen thousand, two hundred thirty-seven".