38171971 has 2 divisors, whose sum is σ = 38171972. Its totient is φ = 38171970.

The previous prime is 38171911. The next prime is 38171999. The reversal of 38171971 is 17917183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38171971 - 2¹⁵ = 38139203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38171971.

It is not a weakly prime, because it can be changed into another prime (38171911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19085985 + 19085986.

It is an arithmetic number, because the mean of its divisors is an integer number (19085986).

Almost surely, 2^38171971 is an apocalyptic number.

38171971 is a deficient number, since it is larger than the sum of its proper divisors (1).

38171971 is an equidigital number, since it uses as much as digits as its factorization.

38171971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 37.

The square root of 38171971 is about 6178.3469472020. The cubic root of 38171971 is about 336.7039374264.

The spelling of 38171971 in words is "thirty-eight million, one hundred seventy-one thousand, nine hundred seventy-one".