38686919 has 2 divisors, whose sum is σ = 38686920. Its totient is φ = 38686918.

The previous prime is 38686889. The next prime is 38686927. The reversal of 38686919 is 91968683.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38686919 - 2²⁰ = 37638343 is a prime.

It is a super-2 number, since 2×38686919² = 2993355403425122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38686019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19343459 + 19343460.

It is an arithmetic number, because the mean of its divisors is an integer number (19343460).

Almost surely, 2^38686919 is an apocalyptic number.

38686919 is a deficient number, since it is larger than the sum of its proper divisors (1).

38686919 is an equidigital number, since it uses as much as digits as its factorization.

38686919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 38686919 is about 6219.8809474137. The cubic root of 38686919 is about 338.2112488467.

The spelling of 38686919 in words is "thirty-eight million, six hundred eighty-six thousand, nine hundred nineteen".