11423909729 has 8 divisors (see below), whose sum is σ = 11772718440. Its totient is φ = 11077209216.

The previous prime is 11423909711. The next prime is 11423909737. The reversal of 11423909729 is 92790932411.

It can be written as a sum of positive squares in 4 ways, for example, as 5456038225 + 5967871504 = 73865^2 + 77252^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11423909729 - 2³² = 7128942433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11423909779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516044 + ... + 537725.

It is an arithmetic number, because the mean of its divisors is an integer number (1471589805).

Almost surely, 2^11423909729 is an apocalyptic number.

It is an amenable number.

11423909729 is a deficient number, since it is larger than the sum of its proper divisors (348808711).

11423909729 is a wasteful number, since it uses less digits than its factorization.

11423909729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054099.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 11423909729 in words is "eleven billion, four hundred twenty-three million, nine hundred nine thousand, seven hundred twenty-nine".