38147971 has 4 divisors (see below), whose sum is σ = 38161432. Its totient is φ = 38134512.

The previous prime is 38147957. The next prime is 38147987. The reversal of 38147971 is 17974183.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17974183 = 127 ⋅141529.

It is a cyclic number.

It is not a de Polignac number, because 38147971 - 2¹³ = 38139779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38147911) 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 in 3 ways as a sum of consecutive naturals, for example, 645 + ... + 8758.

It is an arithmetic number, because the mean of its divisors is an integer number (9540358).

Almost surely, 2^38147971 is an apocalyptic number.

38147971 is a deficient number, since it is larger than the sum of its proper divisors (13461).

38147971 is an equidigital number, since it uses as much as digits as its factorization.

38147971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13460.

The product of its digits is 42336, while the sum is 40.

The square root of 38147971 is about 6176.4043747151. The cubic root of 38147971 is about 336.6333569415.

The spelling of 38147971 in words is "thirty-eight million, one hundred forty-seven thousand, nine hundred seventy-one".