38686157 has 2 divisors, whose sum is σ = 38686158. Its totient is φ = 38686156.

The previous prime is 38686121. The next prime is 38686163. The reversal of 38686157 is 75168683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38613796 + 72361 = 6214^2 + 269^2 .

It is a cyclic number.

It is not a de Polignac number, because 38686157 - 2¹⁰ = 38685133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38686187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19343078 + 19343079.

It is an arithmetic number, because the mean of its divisors is an integer number (19343079).

Almost surely, 2^38686157 is an apocalyptic number.

It is an amenable number.

38686157 is a deficient number, since it is larger than the sum of its proper divisors (1).

38686157 is an equidigital number, since it uses as much as digits as its factorization.

38686157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 38686157 is about 6219.8196919203. The cubic root of 38686157 is about 338.2090282971.

The spelling of 38686157 in words is "thirty-eight million, six hundred eighty-six thousand, one hundred fifty-seven".