131766445 has 4 divisors (see below), whose sum is σ = 158119740. Its totient is φ = 105413152.

The previous prime is 131766443. The next prime is 131766451. The reversal of 131766445 is 544667131.

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 42237001 + 89529444 = 6499^2 + 9462^2 .

It is a cyclic number.

It is not a de Polignac number, because 131766445 - 2¹ = 131766443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131766443) 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, 13176640 + ... + 13176649.

It is an arithmetic number, because the mean of its divisors is an integer number (39529935).

Almost surely, 2^131766445 is an apocalyptic number.

It is an amenable number.

131766445 is a deficient number, since it is larger than the sum of its proper divisors (26353295).

131766445 is an equidigital number, since it uses as much as digits as its factorization.

131766445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26353294.

The product of its digits is 60480, while the sum is 37.

The square root of 131766445 is about 11478.9566163480. The cubic root of 131766445 is about 508.8638620120.

The spelling of 131766445 in words is "one hundred thirty-one million, seven hundred sixty-six thousand, four hundred forty-five".