11423975689 has 9 divisors (see below), whose sum is σ = 13289984967. Its totient is φ = 9791337864.

The previous prime is 11423975677. The next prime is 11423975699. The reversal of 11423975689 is 98657932411.

It is a happy number.

The square root of 11423975689 is 106883.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5167165689 + 6256810000 = 71883^2 + 79100^2 .

It is not a de Polignac number, because 11423975689 - 2⁵ = 11423975657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11423975609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 740547 + ... + 755815.

Almost surely, 2^11423975689 is an apocalyptic number.

11423975689 is the 106883-rd square number.

11423975689 is the 53442-nd centered octagonal number.

It is an amenable number.

11423975689 is a deficient number, since it is larger than the sum of its proper divisors (1866009278).

11423975689 is an frugal number, since it uses more digits than its factorization.

11423975689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30552 (or 15276 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 55.

The spelling of 11423975689 in words is "eleven billion, four hundred twenty-three million, nine hundred seventy-five thousand, six hundred eighty-nine".