23678891 has 4 divisors (see below), whose sum is σ = 24708432. Its totient is φ = 22649352.

The previous prime is 23678867. The next prime is 23678899. The reversal of 23678891 is 19887632.

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 23678891 - 2¹⁸ = 23416747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23678899) 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, 514736 + ... + 514781.

It is an arithmetic number, because the mean of its divisors is an integer number (6177108).

Almost surely, 2^23678891 is an apocalyptic number.

23678891 is a deficient number, since it is larger than the sum of its proper divisors (1029541).

23678891 is a wasteful number, since it uses less digits than its factorization.

23678891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029540.

The product of its digits is 145152, while the sum is 44.

The square root of 23678891 is about 4866.0960738563. The cubic root of 23678891 is about 287.1576911460.

The spelling of 23678891 in words is "twenty-three million, six hundred seventy-eight thousand, eight hundred ninety-one".