131680005 has 8 divisors (see below), whose sum is σ = 210688032. Its totient is φ = 70229328.

The previous prime is 131679973. The next prime is 131680009. The reversal of 131680005 is 500086131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131680005 - 2⁵ = 131679973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131680009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4389319 + ... + 4389348.

It is an arithmetic number, because the mean of its divisors is an integer number (26336004).

Almost surely, 2^131680005 is an apocalyptic number.

131680005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131680005 is a deficient number, since it is larger than the sum of its proper divisors (79008027).

131680005 is an equidigital number, since it uses as much as digits as its factorization.

131680005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8778675.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 131680005 is about 11475.1908480861. The cubic root of 131680005 is about 508.7525645463.

The spelling of 131680005 in words is "one hundred thirty-one million, six hundred eighty thousand, five".