131673305 has 4 divisors (see below), whose sum is σ = 158007972. Its totient is φ = 105338640.

The previous prime is 131673301. The next prime is 131673331. The reversal of 131673305 is 503376131.

It is a happy number.

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 20939776 + 110733529 = 4576^2 + 10523^2 .

It is not a de Polignac number, because 131673305 - 2² = 131673301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131673301) 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, 13167326 + ... + 13167335.

It is an arithmetic number, because the mean of its divisors is an integer number (39501993).

Almost surely, 2^131673305 is an apocalyptic number.

It is an amenable number.

131673305 is a deficient number, since it is larger than the sum of its proper divisors (26334667).

131673305 is an equidigital number, since it uses as much as digits as its factorization.

131673305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26334666.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 131673305 is about 11474.8989102301. The cubic root of 131673305 is about 508.7439358002.

The spelling of 131673305 in words is "one hundred thirty-one million, six hundred seventy-three thousand, three hundred five".