23072709 has 16 divisors (see below), whose sum is σ = 34380864. Its totient is φ = 13641600.

The previous prime is 23072681. The next prime is 23072713. The reversal of 23072709 is 90727032.

It is not a de Polignac number, because 23072709 - 2¹⁵ = 23039941 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23072729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7174 + ... + 9879.

It is an arithmetic number, because the mean of its divisors is an integer number (2148804).

Almost surely, 2^23072709 is an apocalyptic number.

It is an amenable number.

23072709 is a deficient number, since it is larger than the sum of its proper divisors (11308155).

23072709 is a wasteful number, since it uses less digits than its factorization.

23072709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17108.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 23072709 is about 4803.4059790944. The cubic root of 23072709 is about 284.6860562699.

The spelling of 23072709 in words is "twenty-three million, seventy-two thousand, seven hundred nine".