103818681 has 6 divisors (see below), whose sum is σ = 149960330. Its totient is φ = 69212448.

The previous prime is 103818653. The next prime is 103818709. The reversal of 103818681 is 186818301.

It is an interprime number because it is at equal distance from previous prime (103818653) and next prime (103818709).

It can be written as a sum of positive squares in only one way, i.e., 58660281 + 45158400 = 7659^2 + 6720^2 .

It is not a de Polignac number, because 103818681 - 2⁷ = 103818553 is a prime.

It is a super-2 number, since 2×103818681² = 21556637049159522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103818181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5767696 + ... + 5767713.

Almost surely, 2^103818681 is an apocalyptic number.

It is an amenable number.

103818681 is a deficient number, since it is larger than the sum of its proper divisors (46141649).

103818681 is a wasteful number, since it uses less digits than its factorization.

103818681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11535415 (or 11535412 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 103818681 is about 10189.1452536511. The cubic root of 103818681 is about 469.9934826318.

It can be divided in two parts, 1038 and 18681, that multiplied together give a triangular number (19390878 = T₆₂₂₇).

The spelling of 103818681 in words is "one hundred three million, eight hundred eighteen thousand, six hundred eighty-one".