38865139 has 2 divisors, whose sum is σ = 38865140. Its totient is φ = 38865138.

The previous prime is 38865131. The next prime is 38865157. The reversal of 38865139 is 93156883.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38865139 - 2³ = 38865131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38865095 and 38865104.

It is not a weakly prime, because it can be changed into another prime (38865131) 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, 19432569 + 19432570.

It is an arithmetic number, because the mean of its divisors is an integer number (19432570).

Almost surely, 2^38865139 is an apocalyptic number.

38865139 is a deficient number, since it is larger than the sum of its proper divisors (1).

38865139 is an equidigital number, since it uses as much as digits as its factorization.

38865139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 38865139 is about 6234.1911263611. The cubic root of 38865139 is about 338.7298021299.

It can be divided in two parts, 3886 and 5139, that added together give a square (9025 = 95²).

The spelling of 38865139 in words is "thirty-eight million, eight hundred sixty-five thousand, one hundred thirty-nine".