80680391 has 4 divisors (see below), whose sum is σ = 88014984. Its totient is φ = 73345800.

The previous prime is 80680381. The next prime is 80680393. The reversal of 80680391 is 19308608.

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

It is not a de Polignac number, because 80680391 - 2¹⁰ = 80679367 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 (80680393) 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, 3667280 + ... + 3667301.

It is an arithmetic number, because the mean of its divisors is an integer number (22003746).

Almost surely, 2^80680391 is an apocalyptic number.

80680391 is a deficient number, since it is larger than the sum of its proper divisors (7334593).

80680391 is a wasteful number, since it uses less digits than its factorization.

80680391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7334592.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 80680391 is about 8982.2263943857. The cubic root of 80680391 is about 432.1050395442.

Adding to 80680391 its reverse (19308608), we get a palindrome (99988999).

The spelling of 80680391 in words is "eighty million, six hundred eighty thousand, three hundred ninety-one".