10103981 has 2 divisors, whose sum is σ = 10103982. Its totient is φ = 10103980.

The previous prime is 10103957. The next prime is 10103983. The reversal of 10103981 is 18930101.

10103981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9517225 + 586756 = 3085^2 + 766^2 .

It is an emirp because it is prime and its reverse (18930101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10103981 - 2¹⁸ = 9841837 is a prime.

It is a super-2 number, since 2×10103981² = 204180864096722, which contains 22 as substring.

Together with 10103983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10103983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051990 + 5051991.

It is an arithmetic number, because the mean of its divisors is an integer number (5051991).

Almost surely, 2^10103981 is an apocalyptic number.

It is an amenable number.

10103981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10103981 is an equidigital number, since it uses as much as digits as its factorization.

10103981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 10103981 is about 3178.6759822291. The cubic root of 10103981 is about 216.1876298909.

The spelling of 10103981 in words is "ten million, one hundred three thousand, nine hundred eighty-one".