103939681 has 2 divisors, whose sum is σ = 103939682. Its totient is φ = 103939680.

The previous prime is 103939657. The next prime is 103939687. The reversal of 103939681 is 186939301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88059456 + 15880225 = 9384^2 + 3985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103939681 is a prime.

It is a super-2 number, since 2×103939681² = 21606914572763522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (103939687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51969840 + 51969841.

It is an arithmetic number, because the mean of its divisors is an integer number (51969841).

Almost surely, 2^103939681 is an apocalyptic number.

It is an amenable number.

103939681 is a deficient number, since it is larger than the sum of its proper divisors (1).

103939681 is an equidigital number, since it uses as much as digits as its factorization.

103939681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 103939681 is about 10195.0812159590. The cubic root of 103939681 is about 470.1760031942.

The spelling of 103939681 in words is "one hundred three million, nine hundred thirty-nine thousand, six hundred eighty-one".