23688961 has 4 divisors (see below), whose sum is σ = 23701572. Its totient is φ = 23676352.

The previous prime is 23688949. The next prime is 23688967. The reversal of 23688961 is 16988632.

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 10439361 + 13249600 = 3231^2 + 3640^2 .

It is a cyclic number.

It is not a de Polignac number, because 23688961 - 2¹¹ = 23686913 is a prime.

It is a super-2 number, since 2×23688961² = 1122333746519042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23688967) 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, 2860 + ... + 7453.

It is an arithmetic number, because the mean of its divisors is an integer number (5925393).

Almost surely, 2^23688961 is an apocalyptic number.

It is an amenable number.

23688961 is a deficient number, since it is larger than the sum of its proper divisors (12611).

23688961 is a wasteful number, since it uses less digits than its factorization.

23688961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12610.

The product of its digits is 124416, while the sum is 43.

The square root of 23688961 is about 4867.1306742269. The cubic root of 23688961 is about 287.1983922094.

It can be divided in two parts, 23688 and 961, that added together give a square (24649 = 157²).

The spelling of 23688961 in words is "twenty-three million, six hundred eighty-eight thousand, nine hundred sixty-one".