38971381 has 2 divisors, whose sum is σ = 38971382. Its totient is φ = 38971380.

The previous prime is 38971351. The next prime is 38971393. The reversal of 38971381 is 18317983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32890225 + 6081156 = 5735^2 + 2466^2 .

It is an emirp because it is prime and its reverse (18317983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38971381 - 2¹⁹ = 38447093 is a prime.

It is a super-2 number, since 2×38971381² = 3037537074094322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38971301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19485690 + 19485691.

It is an arithmetic number, because the mean of its divisors is an integer number (19485691).

Almost surely, 2^38971381 is an apocalyptic number.

It is an amenable number.

38971381 is a deficient number, since it is larger than the sum of its proper divisors (1).

38971381 is an equidigital number, since it uses as much as digits as its factorization.

38971381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 38971381 is about 6242.7062240666. The cubic root of 38971381 is about 339.0381726520.

The spelling of 38971381 in words is "thirty-eight million, nine hundred seventy-one thousand, three hundred eighty-one".