19934171 has 2 divisors, whose sum is σ = 19934172. Its totient is φ = 19934170.

The previous prime is 19934143. The next prime is 19934191. The reversal of 19934171 is 17143991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19934171 - 2¹⁴ = 19917787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (19934191) 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, 9967085 + 9967086.

It is an arithmetic number, because the mean of its divisors is an integer number (9967086).

Almost surely, 2^19934171 is an apocalyptic number.

19934171 is a deficient number, since it is larger than the sum of its proper divisors (1).

19934171 is an equidigital number, since it uses as much as digits as its factorization.

19934171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 35.

The square root of 19934171 is about 4464.7699828771. The cubic root of 19934171 is about 271.1436219871.

The spelling of 19934171 in words is "nineteen million, nine hundred thirty-four thousand, one hundred seventy-one".