38764381 has 2 divisors, whose sum is σ = 38764382. Its totient is φ = 38764380.

The previous prime is 38764379. The next prime is 38764441. The reversal of 38764381 is 18346783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37100281 + 1664100 = 6091^2 + 1290^2 .

It is a cyclic number.

It is not a de Polignac number, because 38764381 - 2¹ = 38764379 is a prime.

It is a super-2 number, since 2×38764381² = 3005354468626322, which contains 22 as substring.

Together with 38764379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38774381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19382190 + 19382191.

It is an arithmetic number, because the mean of its divisors is an integer number (19382191).

Almost surely, 2^38764381 is an apocalyptic number.

It is an amenable number.

38764381 is a deficient number, since it is larger than the sum of its proper divisors (1).

38764381 is an equidigital number, since it uses as much as digits as its factorization.

38764381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 38764381 is about 6226.1048015593. The cubic root of 38764381 is about 338.4368294329.

The spelling of 38764381 in words is "thirty-eight million, seven hundred sixty-four thousand, three hundred eighty-one".