80171671 has 4 divisors (see below), whose sum is σ = 80803072. Its totient is φ = 79540272.

The previous prime is 80171657. The next prime is 80171683. The reversal of 80171671 is 17617108.

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

It is a cyclic number.

It is not a de Polignac number, because 80171671 - 2⁵ = 80171639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80171071) 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, 315510 + ... + 315763.

It is an arithmetic number, because the mean of its divisors is an integer number (20200768).

Almost surely, 2^80171671 is an apocalyptic number.

80171671 is a deficient number, since it is larger than the sum of its proper divisors (631401).

80171671 is a wasteful number, since it uses less digits than its factorization.

80171671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631400.

The product of its (nonzero) digits is 2352, while the sum is 31.

The square root of 80171671 is about 8953.8634677998. The cubic root of 80171671 is about 431.1949294377.

Adding to 80171671 its reverse (17617108), we get a palindrome (97788779).

The spelling of 80171671 in words is "eighty million, one hundred seventy-one thousand, six hundred seventy-one".