23749189 has 4 divisors (see below), whose sum is σ = 23994124. Its totient is φ = 23504256.

The previous prime is 23749181. The next prime is 23749199. The reversal of 23749189 is 98194732.

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 6980164 + 16769025 = 2642^2 + 4095^2 .

It is a cyclic number.

It is not a de Polignac number, because 23749189 - 2³ = 23749181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23749181) 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, 122322 + ... + 122515.

It is an arithmetic number, because the mean of its divisors is an integer number (5998531).

Almost surely, 2^23749189 is an apocalyptic number.

It is an amenable number.

23749189 is a deficient number, since it is larger than the sum of its proper divisors (244935).

23749189 is an equidigital number, since it uses as much as digits as its factorization.

23749189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244934.

The product of its digits is 108864, while the sum is 43.

The square root of 23749189 is about 4873.3139648498. The cubic root of 23749189 is about 287.4415820816.

The spelling of 23749189 in words is "twenty-three million, seven hundred forty-nine thousand, one hundred eighty-nine".