38683681 has 2 divisors, whose sum is σ = 38683682. Its totient is φ = 38683680.

The previous prime is 38683663. The next prime is 38683717. The reversal of 38683681 is 18638683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22240656 + 16443025 = 4716^2 + 4055^2 .

It is a cyclic number.

It is not a de Polignac number, because 38683681 - 2¹¹ = 38681633 is a prime.

It is a super-2 number, since 2×38683681² = 2992854351419522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38683621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19341840 + 19341841.

It is an arithmetic number, because the mean of its divisors is an integer number (19341841).

Almost surely, 2^38683681 is an apocalyptic number.

It is an amenable number.

38683681 is a deficient number, since it is larger than the sum of its proper divisors (1).

38683681 is an equidigital number, since it uses as much as digits as its factorization.

38683681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The square root of 38683681 is about 6219.6206475958. The cubic root of 38683681 is about 338.2018127668.

The spelling of 38683681 in words is "thirty-eight million, six hundred eighty-three thousand, six hundred eighty-one".