23391543 has 8 divisors (see below), whose sum is σ = 35644288. Its totient is φ = 13366584.

The previous prime is 23391493. The next prime is 23391547. The reversal of 23391543 is 34519332.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23391543 - 2⁸ = 23391287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23391543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23391547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556921 + ... + 556962.

It is an arithmetic number, because the mean of its divisors is an integer number (4455536).

Almost surely, 2^23391543 is an apocalyptic number.

23391543 is a deficient number, since it is larger than the sum of its proper divisors (12252745).

23391543 is a wasteful number, since it uses less digits than its factorization.

23391543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113893.

The product of its digits is 9720, while the sum is 30.

The square root of 23391543 is about 4836.4804351925. The cubic root of 23391543 is about 285.9913888877.

The spelling of 23391543 in words is "twenty-three million, three hundred ninety-one thousand, five hundred forty-three".