80689673 has 4 divisors (see below), whose sum is σ = 80713620. Its totient is φ = 80665728.

The previous prime is 80689657. The next prime is 80689699. The reversal of 80689673 is 37698608.

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

It can be written as a sum of positive squares in 2 ways, for example, as 61653904 + 19035769 = 7852^2 + 4363^2 .

It is a cyclic number.

It is not a de Polignac number, because 80689673 - 2⁴ = 80689657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80689603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5888 + ... + 14001.

It is an arithmetic number, because the mean of its divisors is an integer number (20178405).

Almost surely, 2^80689673 is an apocalyptic number.

It is an amenable number.

80689673 is a deficient number, since it is larger than the sum of its proper divisors (23947).

80689673 is a wasteful number, since it uses less digits than its factorization.

80689673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23946.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 80689673 is about 8982.7430665694. The cubic root of 80689673 is about 432.1216096390.

The spelling of 80689673 in words is "eighty million, six hundred eighty-nine thousand, six hundred seventy-three".