38871947 has 2 divisors, whose sum is σ = 38871948. Its totient is φ = 38871946.

The previous prime is 38871901. The next prime is 38871983. The reversal of 38871947 is 74917883.

It is a strong prime.

It is an emirp because it is prime and its reverse (74917883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38871947 - 2⁶ = 38871883 is a prime.

It is a super-2 number, since 2×38871947² = 3022056527141618, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38871047) 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, 19435973 + 19435974.

It is an arithmetic number, because the mean of its divisors is an integer number (19435974).

Almost surely, 2^38871947 is an apocalyptic number.

38871947 is a deficient number, since it is larger than the sum of its proper divisors (1).

38871947 is an equidigital number, since it uses as much as digits as its factorization.

38871947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 47.

The square root of 38871947 is about 6234.7371235682. The cubic root of 38871947 is about 338.7495793897.

The spelling of 38871947 in words is "thirty-eight million, eight hundred seventy-one thousand, nine hundred forty-seven".