110239981 has 2 divisors, whose sum is σ = 110239982. Its totient is φ = 110239980.

The previous prime is 110239979. The next prime is 110240023. The reversal of 110239981 is 189932011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71064900 + 39175081 = 8430^2 + 6259^2 .

It is an emirp because it is prime and its reverse (189932011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 110239981 - 2¹ = 110239979 is a prime.

It is a super-3 number, since 3×110239981³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 110239979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110239931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55119990 + 55119991.

It is an arithmetic number, because the mean of its divisors is an integer number (55119991).

Almost surely, 2^110239981 is an apocalyptic number.

It is an amenable number.

110239981 is a deficient number, since it is larger than the sum of its proper divisors (1).

110239981 is an equidigital number, since it uses as much as digits as its factorization.

110239981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 110239981 is about 10499.5228939224. The cubic root of 110239981 is about 479.4901719343.

The spelling of 110239981 in words is "one hundred ten million, two hundred thirty-nine thousand, nine hundred eighty-one".