23402789 has 4 divisors (see below), whose sum is σ = 23482956. Its totient is φ = 23322624.

The previous prime is 23402783. The next prime is 23402791. The reversal of 23402789 is 98720432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12545764 + 10857025 = 3542^2 + 3295^2 .

It is a cyclic number.

It is not a de Polignac number, because 23402789 - 2⁴ = 23402773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23402783) 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 3 ways as a sum of consecutive naturals, for example, 39644 + ... + 40229.

It is an arithmetic number, because the mean of its divisors is an integer number (5870739).

Almost surely, 2^23402789 is an apocalyptic number.

It is an amenable number.

23402789 is a deficient number, since it is larger than the sum of its proper divisors (80167).

23402789 is an equidigital number, since it uses as much as digits as its factorization.

23402789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80166.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 23402789 is about 4837.6429177855. The cubic root of 23402789 is about 286.0372137665.

The spelling of 23402789 in words is "twenty-three million, four hundred two thousand, seven hundred eighty-nine".