23609539 has 4 divisors (see below), whose sum is σ = 24055056. Its totient is φ = 23164024.

The previous prime is 23609519. The next prime is 23609543. The reversal of 23609539 is 93590632.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23609539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23609498 and 23609507.

It is not an unprimeable number, because it can be changed into a prime (23609519) 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, 222679 + ... + 222784.

It is an arithmetic number, because the mean of its divisors is an integer number (6013764).

Almost surely, 2^23609539 is an apocalyptic number.

23609539 is a deficient number, since it is larger than the sum of its proper divisors (445517).

23609539 is an equidigital number, since it uses as much as digits as its factorization.

23609539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445516.

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 23609539 is about 4858.9648074461. The cubic root of 23609539 is about 286.8770694091.

The spelling of 23609539 in words is "twenty-three million, six hundred nine thousand, five hundred thirty-nine".