38266681 has 2 divisors, whose sum is σ = 38266682. Its totient is φ = 38266680.

The previous prime is 38266667. The next prime is 38266691. The reversal of 38266681 is 18666283.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37100281 + 1166400 = 6091^2 + 1080^2 .

It is an emirp because it is prime and its reverse (18666283) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38266681 - 2⁵ = 38266649 is a prime.

It is a super-2 number, since 2×38266681² = 2928677749511522, which contains 22 as substring.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (38266661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19133340 + 19133341.

It is an arithmetic number, because the mean of its divisors is an integer number (19133341).

Almost surely, 2^38266681 is an apocalyptic number.

It is an amenable number.

38266681 is a deficient number, since it is larger than the sum of its proper divisors (1).

38266681 is an equidigital number, since it uses as much as digits as its factorization.

38266681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 40.

The square root of 38266681 is about 6186.0068703486. The cubic root of 38266681 is about 336.9821772927.

The spelling of 38266681 in words is "thirty-eight million, two hundred sixty-six thousand, six hundred eighty-one".