131808761 has 8 divisors (see below), whose sum is σ = 150845184. Its totient is φ = 112824000.

The previous prime is 131808749. The next prime is 131808797. The reversal of 131808761 is 167808131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131808761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131808961) 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, 7280 + ... + 17793.

It is an arithmetic number, because the mean of its divisors is an integer number (18855648).

Almost surely, 2^131808761 is an apocalyptic number.

It is an amenable number.

131808761 is a deficient number, since it is larger than the sum of its proper divisors (19036423).

131808761 is an equidigital number, since it uses as much as digits as its factorization.

131808761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25831.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 131808761 is about 11480.7996672706. The cubic root of 131808761 is about 508.9183290364.

The spelling of 131808761 in words is "one hundred thirty-one million, eight hundred eight thousand, seven hundred sixty-one".