171942938 has 4 divisors (see below), whose sum is σ = 257914410. Its totient is φ = 85971468.

The previous prime is 171942937. The next prime is 171942961. The reversal of 171942938 is 839249171.

171942938 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.

It can be written as a sum of positive squares in only one way, i.e., 166848889 + 5094049 = 12917^2 + 2257^2 .

It is not an unprimeable number, because it can be changed into a prime (171942931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42985733 + ... + 42985736.

Almost surely, 2^171942938 is an apocalyptic number.

171942938 is a deficient number, since it is larger than the sum of its proper divisors (85971472).

171942938 is an equidigital number, since it uses as much as digits as its factorization.

171942938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85971471.

The product of its digits is 108864, while the sum is 44.

The square root of 171942938 is about 13112.7013997879. The cubic root of 171942938 is about 556.0682700877.

The spelling of 171942938 in words is "one hundred seventy-one million, nine hundred forty-two thousand, nine hundred thirty-eight".