38971861 has 4 divisors (see below), whose sum is σ = 39336192. Its totient is φ = 38607532.

The previous prime is 38971859. The next prime is 38971879. The reversal of 38971861 is 16817983.

38971861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38971861 - 2¹ = 38971859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38971811) 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 in 3 ways as a sum of consecutive naturals, for example, 182005 + ... + 182218.

It is an arithmetic number, because the mean of its divisors is an integer number (9834048).

Almost surely, 2^38971861 is an apocalyptic number.

It is an amenable number.

38971861 is a deficient number, since it is larger than the sum of its proper divisors (364331).

38971861 is a wasteful number, since it uses less digits than its factorization.

38971861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364330.

The product of its digits is 72576, while the sum is 43.

The square root of 38971861 is about 6242.7446688135. The cubic root of 38971861 is about 339.0395645936.

The spelling of 38971861 in words is "thirty-eight million, nine hundred seventy-one thousand, eight hundred sixty-one".