23785129 has 3 divisors (see below), whose sum is σ = 23790007. Its totient is φ = 23780252.

The previous prime is 23785121. The next prime is 23785163. The reversal of 23785129 is 92158732.

The square root of 23785129 is 4877.

It is a perfect power (a square), and thus also a powerful number.

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 only one way, i.e., 6579225 + 17205904 = 2565^2 + 4148^2 .

It is not a de Polignac number, because 23785129 - 2³ = 23785121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23785121) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2439 + ... + 7315.

Almost surely, 2^23785129 is an apocalyptic number.

23785129 is the 4877-th square number.

23785129 is the 2439-th centered octagonal number.

It is an amenable number.

23785129 is a deficient number, since it is larger than the sum of its proper divisors (4878).

23785129 is an frugal number, since it uses more digits than its factorization.

23785129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9754 (or 4877 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The cubic root of 23785129 is about 287.5865055378.

The spelling of 23785129 in words is "twenty-three million, seven hundred eighty-five thousand, one hundred twenty-nine".