38866187 has 2 divisors, whose sum is σ = 38866188. Its totient is φ = 38866186.

The previous prime is 38866171. The next prime is 38866193. The reversal of 38866187 is 78166883.

It is a strong prime.

It is an emirp because it is prime and its reverse (78166883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38866187 - 2⁴ = 38866171 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38866117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19433093 + 19433094.

It is an arithmetic number, because the mean of its divisors is an integer number (19433094).

Almost surely, 2^38866187 is an apocalyptic number.

38866187 is a deficient number, since it is larger than the sum of its proper divisors (1).

38866187 is an equidigital number, since it uses as much as digits as its factorization.

38866187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 47.

The square root of 38866187 is about 6234.2751783988. The cubic root of 38866187 is about 338.7328467234.

The spelling of 38866187 in words is "thirty-eight million, eight hundred sixty-six thousand, one hundred eighty-seven".