1223535997 has 2 divisors, whose sum is σ = 1223535998. Its totient is φ = 1223535996.

The previous prime is 1223535983. The next prime is 1223536031. The reversal of 1223535997 is 7995353221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1220733721 + 2802276 = 34939^2 + 1674^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223535997 - 2¹⁹ = 1223011709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223535947) 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, 611767998 + 611767999.

It is an arithmetic number, because the mean of its divisors is an integer number (611767999).

Almost surely, 2^1223535997 is an apocalyptic number.

It is an amenable number.

1223535997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223535997 is an equidigital number, since it uses as much as digits as its factorization.

1223535997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 510300, while the sum is 46.

The square root of 1223535997 is about 34979.0794189899. The cubic root of 1223535997 is about 1069.5610617009.

The spelling of 1223535997 in words is "one billion, two hundred twenty-three million, five hundred thirty-five thousand, nine hundred ninety-seven".