23842129 has 4 divisors (see below), whose sum is σ = 23852980. Its totient is φ = 23831280.

The previous prime is 23842123. The next prime is 23842139. The reversal of 23842129 is 92124832.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19228225 + 4613904 = 4385^2 + 2148^2 .

It is a cyclic number.

It is not a de Polignac number, because 23842129 - 2¹³ = 23833937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23842129.

It is not an unprimeable number, because it can be changed into a prime (23842123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834 + ... + 6955.

It is an arithmetic number, because the mean of its divisors is an integer number (5963245).

Almost surely, 2^23842129 is an apocalyptic number.

It is an amenable number.

23842129 is a deficient number, since it is larger than the sum of its proper divisors (10851).

23842129 is an equidigital number, since it uses as much as digits as its factorization.

23842129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10850.

The product of its digits is 6912, while the sum is 31.

The square root of 23842129 is about 4882.8402595211. The cubic root of 23842129 is about 287.8160516777.

The spelling of 23842129 in words is "twenty-three million, eight hundred forty-two thousand, one hundred twenty-nine".