80671947 has 4 divisors (see below), whose sum is σ = 107562600. Its totient is φ = 53781296.

The previous prime is 80671937. The next prime is 80671949. The reversal of 80671947 is 74917608.

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 80671947 - 2⁴ = 80671931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80671899 and 80671908.

It is not an unprimeable number, because it can be changed into a prime (80671949) 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, 13445322 + ... + 13445327.

It is an arithmetic number, because the mean of its divisors is an integer number (26890650).

Almost surely, 2^80671947 is an apocalyptic number.

80671947 is a deficient number, since it is larger than the sum of its proper divisors (26890653).

80671947 is a wasteful number, since it uses less digits than its factorization.

80671947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26890652.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 80671947 is about 8981.7563427205. The cubic root of 80671947 is about 432.0899643311.

It can be divided in two parts, 80671 and 947, that added together give a palindrome (81618).

The spelling of 80671947 in words is "eighty million, six hundred seventy-one thousand, nine hundred forty-seven".