131766605 has 8 divisors (see below), whose sum is σ = 158397432. Its totient is φ = 105228288.

The previous prime is 131766601. The next prime is 131766617. The reversal of 131766605 is 506667131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 85784644 + 45981961 = 9262^2 + 6781^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 131766605 - 2² = 131766601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131766601) 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, 19952 + ... + 25721.

It is an arithmetic number, because the mean of its divisors is an integer number (19799679).

Almost surely, 2^131766605 is an apocalyptic number.

It is an amenable number.

131766605 is a deficient number, since it is larger than the sum of its proper divisors (26630827).

131766605 is an equidigital number, since it uses as much as digits as its factorization.

131766605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46255.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 131766605 is about 11478.9635856204. The cubic root of 131766605 is about 508.8640679779.

The spelling of 131766605 in words is "one hundred thirty-one million, seven hundred sixty-six thousand, six hundred five".