103887981 has 16 divisors (see below), whose sum is σ = 156078720. Its totient is φ = 68281920.

The previous prime is 103887977. The next prime is 103888007. The reversal of 103887981 is 189788301.

It is not a de Polignac number, because 103887981 - 2² = 103887977 is a prime.

It is a super-2 number, since 2×103887981² = 21585425192512722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103887961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25180 + ... + 29013.

It is an arithmetic number, because the mean of its divisors is an integer number (9754920).

Almost surely, 2^103887981 is an apocalyptic number.

It is an amenable number.

103887981 is a deficient number, since it is larger than the sum of its proper divisors (52190739).

103887981 is an equidigital number, since it uses as much as digits as its factorization.

103887981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54273 (or 54267 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 103887981 is about 10192.5453641375. The cubic root of 103887981 is about 470.0980344770.

The spelling of 103887981 in words is "one hundred three million, eight hundred eighty-seven thousand, nine hundred eighty-one".