1223535723 has 16 divisors (see below), whose sum is σ = 1776460800. Its totient is φ = 746111520.

The previous prime is 1223535689. The next prime is 1223535739. The reversal of 1223535723 is 3275353221.

It is a happy number.

It is not a de Polignac number, because 1223535723 - 2¹⁶ = 1223470187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223535773) 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 in 15 ways as a sum of consecutive naturals, for example, 368443 + ... + 371748.

It is an arithmetic number, because the mean of its divisors is an integer number (111028800).

Almost surely, 2^1223535723 is an apocalyptic number.

1223535723 is a deficient number, since it is larger than the sum of its proper divisors (552925077).

1223535723 is a wasteful number, since it uses less digits than its factorization.

1223535723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740242.

The product of its digits is 37800, while the sum is 33.

The square root of 1223535723 is about 34979.0755023628. The cubic root of 1223535723 is about 1069.5609818613.

Adding to 1223535723 its reverse (3275353221), we get a palindrome (4498888944).

The spelling of 1223535723 in words is "one billion, two hundred twenty-three million, five hundred thirty-five thousand, seven hundred twenty-three".