38417681 has 2 divisors, whose sum is σ = 38417682. Its totient is φ = 38417680.

The previous prime is 38417669. The next prime is 38417683. The reversal of 38417681 is 18671483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24167056 + 14250625 = 4916^2 + 3775^2 .

It is an emirp because it is prime and its reverse (18671483) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38417681 is a prime.

It is a super-2 number, since 2×38417681² = 2951836426835522, which contains 22 as substring.

Together with 38417683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38417683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19208840 + 19208841.

It is an arithmetic number, because the mean of its divisors is an integer number (19208841).

Almost surely, 2^38417681 is an apocalyptic number.

It is an amenable number.

38417681 is a deficient number, since it is larger than the sum of its proper divisors (1).

38417681 is an equidigital number, since it uses as much as digits as its factorization.

38417681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 38417681 is about 6198.1998193024. The cubic root of 38417681 is about 337.4248384982.

It can be divided in two parts, 3841 and 7681, that multiplied together give a triangular number (29502721 = T₇₆₈₁).

The spelling of 38417681 in words is "thirty-eight million, four hundred seventeen thousand, six hundred eighty-one".