80471191 has 4 divisors (see below), whose sum is σ = 82183392. Its totient is φ = 78758992.

The previous prime is 80471179. The next prime is 80471249. The reversal of 80471191 is 19117408.

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 80471191 - 2¹³ = 80462999 is a prime.

It is a super-2 number, since 2×80471191² = 12951225161916962, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80471161) 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, 856030 + ... + 856123.

It is an arithmetic number, because the mean of its divisors is an integer number (20545848).

Almost surely, 2^80471191 is an apocalyptic number.

80471191 is a deficient number, since it is larger than the sum of its proper divisors (1712201).

80471191 is a wasteful number, since it uses less digits than its factorization.

80471191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712200.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 80471191 is about 8970.5736159958. The cubic root of 80471191 is about 431.7312410829.

Adding to 80471191 its reverse (19117408), we get a palindrome (99588599).

The spelling of 80471191 in words is "eighty million, four hundred seventy-one thousand, one hundred ninety-one".