1671213171 has 4 divisors (see below), whose sum is σ = 2228284232. Its totient is φ = 1114142112.

The previous prime is 1671213149. The next prime is 1671213197. The reversal of 1671213171 is 1713121761.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1671213171 - 2¹¹ = 1671211123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1671213121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278535526 + ... + 278535531.

It is an arithmetic number, because the mean of its divisors is an integer number (557071058).

Almost surely, 2^1671213171 is an apocalyptic number.

1671213171 is a deficient number, since it is larger than the sum of its proper divisors (557071061).

1671213171 is an equidigital number, since it uses as much as digits as its factorization.

1671213171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557071060.

The product of its digits is 1764, while the sum is 30.

The square root of 1671213171 is about 40880.4742022399. The cubic root of 1671213171 is about 1186.7082180547.

The spelling of 1671213171 in words is "one billion, six hundred seventy-one million, two hundred thirteen thousand, one hundred seventy-one".