23981603 has 4 divisors (see below), whose sum is σ = 24070368. Its totient is φ = 23892840.

The previous prime is 23981563. The next prime is 23981621. The reversal of 23981603 is 30618932.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23981603 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 23981603.

It is not an unprimeable number, because it can be changed into a prime (23981623) 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, 43976 + ... + 44517.

It is an arithmetic number, because the mean of its divisors is an integer number (6017592).

Almost surely, 2^23981603 is an apocalyptic number.

23981603 is a deficient number, since it is larger than the sum of its proper divisors (88765).

23981603 is an equidigital number, since it uses as much as digits as its factorization.

23981603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88764.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 23981603 is about 4897.1014896569. The cubic root of 23981603 is about 288.3761922620.

The spelling of 23981603 in words is "twenty-three million, nine hundred eighty-one thousand, six hundred three".