131667747 has 4 divisors (see below), whose sum is σ = 175557000. Its totient is φ = 87778496.

The previous prime is 131667721. The next prime is 131667751. The reversal of 131667747 is 747766131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131667747 - 2⁷ = 131667619 is a prime.

It is a super-3 number, since 3×131667747³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131667699 and 131667708.

It is not an unprimeable number, because it can be changed into a prime (131667787) 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, 21944622 + ... + 21944627.

It is an arithmetic number, because the mean of its divisors is an integer number (43889250).

Almost surely, 2^131667747 is an apocalyptic number.

131667747 is a deficient number, since it is larger than the sum of its proper divisors (43889253).

131667747 is an equidigital number, since it uses as much as digits as its factorization.

131667747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43889252.

The product of its digits is 148176, while the sum is 42.

The square root of 131667747 is about 11474.6567268917. The cubic root of 131667747 is about 508.7367775824.

The spelling of 131667747 in words is "one hundred thirty-one million, six hundred sixty-seven thousand, seven hundred forty-seven".