104039681 has 2 divisors, whose sum is σ = 104039682. Its totient is φ = 104039680.

The previous prime is 104039659. The next prime is 104039699. The reversal of 104039681 is 186930401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58003456 + 46036225 = 7616^2 + 6785^2 .

It is a cyclic number.

It is not a de Polignac number, because 104039681 - 2²² = 99845377 is a prime.

It is a super-4 number, since 4×104039681⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (104039641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52019840 + 52019841.

It is an arithmetic number, because the mean of its divisors is an integer number (52019841).

Almost surely, 2^104039681 is an apocalyptic number.

It is an amenable number.

104039681 is a deficient number, since it is larger than the sum of its proper divisors (1).

104039681 is an equidigital number, since it uses as much as digits as its factorization.

104039681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 104039681 is about 10199.9843627331. The cubic root of 104039681 is about 470.3267397542.

The spelling of 104039681 in words is "one hundred four million, thirty-nine thousand, six hundred eighty-one".