38681807 has 2 divisors, whose sum is σ = 38681808. Its totient is φ = 38681806.

The previous prime is 38681789. The next prime is 38681809. The reversal of 38681807 is 70818683.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38681807 - 2⁶ = 38681743 is a prime.

Together with 38681809, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38681809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19340903 + 19340904.

It is an arithmetic number, because the mean of its divisors is an integer number (19340904).

Almost surely, 2^38681807 is an apocalyptic number.

38681807 is a deficient number, since it is larger than the sum of its proper divisors (1).

38681807 is an equidigital number, since it uses as much as digits as its factorization.

38681807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 38681807 is about 6219.4699934962. The cubic root of 38681807 is about 338.1963513731.

The spelling of 38681807 in words is "thirty-eight million, six hundred eighty-one thousand, eight hundred seven".