131766013 has 4 divisors (see below), whose sum is σ = 133246620. Its totient is φ = 130285408.

The previous prime is 131766001. The next prime is 131766029. The reversal of 131766013 is 310667131.

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 19342404 + 112423609 = 4398^2 + 10603^2 .

It is a cyclic number.

It is not a de Polignac number, because 131766013 - 2⁵ = 131765981 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 (131766413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740170 + ... + 740347.

It is an arithmetic number, because the mean of its divisors is an integer number (33311655).

Almost surely, 2^131766013 is an apocalyptic number.

It is an amenable number.

131766013 is a deficient number, since it is larger than the sum of its proper divisors (1480607).

131766013 is an equidigital number, since it uses as much as digits as its factorization.

131766013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480606.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 131766013 is about 11478.9377992914. The cubic root of 131766013 is about 508.8633059032.

The spelling of 131766013 in words is "one hundred thirty-one million, seven hundred sixty-six thousand, thirteen".