38339681 has 2 divisors, whose sum is σ = 38339682. Its totient is φ = 38339680.

The previous prime is 38339677. The next prime is 38339713. The reversal of 38339681 is 18693383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25090081 + 13249600 = 5009^2 + 3640^2 .

It is a cyclic number.

It is not a de Polignac number, because 38339681 - 2² = 38339677 is a prime.

It is a super-2 number, since 2×38339681² = 2939862278363522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38339671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19169840 + 19169841.

It is an arithmetic number, because the mean of its divisors is an integer number (19169841).

Almost surely, 2^38339681 is an apocalyptic number.

It is an amenable number.

38339681 is a deficient number, since it is larger than the sum of its proper divisors (1).

38339681 is an equidigital number, since it uses as much as digits as its factorization.

38339681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 38339681 is about 6191.9044727773. The cubic root of 38339681 is about 337.1963241884.

The spelling of 38339681 in words is "thirty-eight million, three hundred thirty-nine thousand, six hundred eighty-one".