23561973 has 6 divisors (see below), whose sum is σ = 34033974. Its totient is φ = 15707976.

The previous prime is 23561947. The next prime is 23561999. The reversal of 23561973 is 37916532.

23561973 is a `hidden beast` number, since 2 + 3 + 561 + 97 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (23561947) and next prime (23561999).

It can be written as a sum of positive squares in only one way, i.e., 12552849 + 11009124 = 3543^2 + 3318^2 .

It is not a de Polignac number, because 23561973 - 2¹⁰ = 23560949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23561903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1308990 + ... + 1309007.

It is an arithmetic number, because the mean of its divisors is an integer number (5672329).

Almost surely, 2^23561973 is an apocalyptic number.

It is an amenable number.

23561973 is a deficient number, since it is larger than the sum of its proper divisors (10472001).

23561973 is a wasteful number, since it uses less digits than its factorization.

23561973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618003 (or 2618000 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 23561973 is about 4854.0676756716. The cubic root of 23561973 is about 286.6842833654.

The spelling of 23561973 in words is "twenty-three million, five hundred sixty-one thousand, nine hundred seventy-three".