80688005 has 16 divisors (see below), whose sum is σ = 100623600. Its totient is φ = 62039040.

The previous prime is 80687983. The next prime is 80688007. The reversal of 80688005 is 50088608.

It can be written as a sum of positive squares in 8 ways, for example, as 5189284 + 75498721 = 2278^2 + 8689^2 .

It is not a de Polignac number, because 80688005 - 2¹² = 80683909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80688007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33791 + ... + 36099.

It is an arithmetic number, because the mean of its divisors is an integer number (6288975).

Almost surely, 2^80688005 is an apocalyptic number.

It is an amenable number.

80688005 is a deficient number, since it is larger than the sum of its proper divisors (19935595).

80688005 is a wasteful number, since it uses less digits than its factorization.

80688005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 80688005 is about 8982.6502213990. The cubic root of 80688005 is about 432.1186320427.

The spelling of 80688005 in words is "eighty million, six hundred eighty-eight thousand, five".