23109729 has 8 divisors (see below), whose sum is σ = 30912672. Its totient is φ = 15356640.

The previous prime is 23109689. The next prime is 23109739. The reversal of 23109729 is 92790132.

23109729 = T₂₁₇ + T₂₁₈ + ... + T₅₂₉.

23109729 is nontrivially palindromic in base 16.

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

It is not a de Polignac number, because 23109729 - 2⁹ = 23109217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23109729.

It is not an unprimeable number, because it can be changed into a prime (23109739) 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, 11367 + ... + 13244.

It is an arithmetic number, because the mean of its divisors is an integer number (3864084).

Almost surely, 2^23109729 is an apocalyptic number.

It is an amenable number.

23109729 is a deficient number, since it is larger than the sum of its proper divisors (7802943).

23109729 is a wasteful number, since it uses less digits than its factorization.

23109729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24927.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 23109729 is about 4807.2579502248. The cubic root of 23109729 is about 284.8382338375.

The spelling of 23109729 in words is "twenty-three million, one hundred nine thousand, seven hundred twenty-nine".