23789981 has 8 divisors (see below), whose sum is σ = 25140480. Its totient is φ = 22465872.

The previous prime is 23789977. The next prime is 23790007. The reversal of 23789981 is 18998732.

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

It is a cyclic number.

It is not a de Polignac number, because 23789981 - 2² = 23789977 is a prime.

It is a super-2 number, since 2×23789981² = 1131926391960722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23789081) 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, 4730 + ... + 8363.

It is an arithmetic number, because the mean of its divisors is an integer number (3142560).

Almost surely, 2^23789981 is an apocalyptic number.

It is an amenable number.

23789981 is a deficient number, since it is larger than the sum of its proper divisors (1350499).

23789981 is a wasteful number, since it uses less digits than its factorization.

23789981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13195.

The product of its digits is 217728, while the sum is 47.

The square root of 23789981 is about 4877.4974115831. The cubic root of 23789981 is about 287.6060594203.

The spelling of 23789981 in words is "twenty-three million, seven hundred eighty-nine thousand, nine hundred eighty-one".