23740891 has 4 divisors (see below), whose sum is σ = 25137432. Its totient is φ = 22344352.

The previous prime is 23740883. The next prime is 23740901. The reversal of 23740891 is 19804732.

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 23740891 - 2³ = 23740883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23740811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698245 + ... + 698278.

It is an arithmetic number, because the mean of its divisors is an integer number (6284358).

Almost surely, 2^23740891 is an apocalyptic number.

23740891 is a deficient number, since it is larger than the sum of its proper divisors (1396541).

23740891 is a wasteful number, since it uses less digits than its factorization.

23740891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396540.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 23740891 is about 4872.4625190965. The cubic root of 23740891 is about 287.4081006842.

The spelling of 23740891 in words is "twenty-three million, seven hundred forty thousand, eight hundred ninety-one".