38688197 has 2 divisors, whose sum is σ = 38688198. Its totient is φ = 38688196.

The previous prime is 38688193. The next prime is 38688203. The reversal of 38688197 is 79188683.

It is a happy number.

38688197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22033636 + 16654561 = 4694^2 + 4081^2 .

It is a cyclic number.

It is not a de Polignac number, because 38688197 - 2² = 38688193 is a prime.

It is a super-2 number, since 2×38688197² = 2993553174221618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38688193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19344098 + 19344099.

It is an arithmetic number, because the mean of its divisors is an integer number (19344099).

Almost surely, 2^38688197 is an apocalyptic number.

It is an amenable number.

38688197 is a deficient number, since it is larger than the sum of its proper divisors (1).

38688197 is an equidigital number, since it uses as much as digits as its factorization.

38688197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 50.

The square root of 38688197 is about 6219.9836816506. The cubic root of 38688197 is about 338.2149730101.

The spelling of 38688197 in words is "thirty-eight million, six hundred eighty-eight thousand, one hundred ninety-seven".