23689951 has 4 divisors (see below), whose sum is σ = 23907400. Its totient is φ = 23472504.

The previous prime is 23689901. The next prime is 23689961. The reversal of 23689951 is 15998632.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23689951 - 2¹¹ = 23687903 is a prime.

It is a super-2 number, since 2×23689951² = 1122427556764802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23689898 and 23689907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23689901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108561 + ... + 108778.

It is an arithmetic number, because the mean of its divisors is an integer number (5976850).

Almost surely, 2^23689951 is an apocalyptic number.

23689951 is a deficient number, since it is larger than the sum of its proper divisors (217449).

23689951 is a wasteful number, since it uses less digits than its factorization.

23689951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217448.

The product of its digits is 116640, while the sum is 43.

The square root of 23689951 is about 4867.2323757963. The cubic root of 23689951 is about 287.2023929821.

The spelling of 23689951 in words is "twenty-three million, six hundred eighty-nine thousand, nine hundred fifty-one".