171971493 has 8 divisors (see below), whose sum is σ = 230033856. Its totient is φ = 114278400.

The previous prime is 171971447. The next prime is 171971497. The reversal of 171971493 is 394179171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 171971493 - 2¹⁷ = 171840421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171971497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91228 + ... + 93093.

It is an arithmetic number, because the mean of its divisors is an integer number (28754232).

Almost surely, 2^171971493 is an apocalyptic number.

It is an amenable number.

171971493 is a deficient number, since it is larger than the sum of its proper divisors (58062363).

171971493 is a wasteful number, since it uses less digits than its factorization.

171971493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184635.

The product of its digits is 47628, while the sum is 42.

The square root of 171971493 is about 13113.7901843822. The cubic root of 171971493 is about 556.0990509400.

The spelling of 171971493 in words is "one hundred seventy-one million, nine hundred seventy-one thousand, four hundred ninety-three".