1223537849 has 2 divisors, whose sum is σ = 1223537850. Its totient is φ = 1223537848.

The previous prime is 1223537839. The next prime is 1223537863. The reversal of 1223537849 is 9487353221.

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., 1126810624 + 96727225 = 33568^2 + 9835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223537849 - 2⁸ = 1223537593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223537839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611768924 + 611768925.

It is an arithmetic number, because the mean of its divisors is an integer number (611768925).

Almost surely, 2^1223537849 is an apocalyptic number.

It is an amenable number.

1223537849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223537849 is an equidigital number, since it uses as much as digits as its factorization.

1223537849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 1223537849 is about 34979.1058919464. The cubic root of 1223537849 is about 1069.5616013461.

The spelling of 1223537849 in words is "one billion, two hundred twenty-three million, five hundred thirty-seven thousand, eight hundred forty-nine".