23948781 has 4 divisors (see below), whose sum is σ = 31931712. Its totient is φ = 15965852.

The previous prime is 23948777. The next prime is 23948851. The reversal of 23948781 is 18784932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23948781 - 2² = 23948777 is a prime.

It is a super-2 number, since 2×23948781² = 1147088222771922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23948741) 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, 3991461 + ... + 3991466.

It is an arithmetic number, because the mean of its divisors is an integer number (7982928).

Almost surely, 2^23948781 is an apocalyptic number.

It is an amenable number.

23948781 is a deficient number, since it is larger than the sum of its proper divisors (7982931).

23948781 is an equidigital number, since it uses as much as digits as its factorization.

23948781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7982930.

The product of its digits is 96768, while the sum is 42.

The square root of 23948781 is about 4893.7491762451. The cubic root of 23948781 is about 288.2445718592.

It can be divided in two parts, 2394 and 8781, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 23948781 in words is "twenty-three million, nine hundred forty-eight thousand, seven hundred eighty-one".