38686819 has 2 divisors, whose sum is σ = 38686820. Its totient is φ = 38686818.

The previous prime is 38686811. The next prime is 38686829. The reversal of 38686819 is 91868683.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38686819 - 2³ = 38686811 is a prime.

It is a super-2 number, since 2×38686819² = 2993339928677522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38686811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19343409 + 19343410.

It is an arithmetic number, because the mean of its divisors is an integer number (19343410).

Almost surely, 2^38686819 is an apocalyptic number.

38686819 is a deficient number, since it is larger than the sum of its proper divisors (1).

38686819 is an equidigital number, since it uses as much as digits as its factorization.

38686819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 49.

The square root of 38686819 is about 6219.8729086694. The cubic root of 38686819 is about 338.2109574377.

The spelling of 38686819 in words is "thirty-eight million, six hundred eighty-six thousand, eight hundred nineteen".