131986786 has 8 divisors (see below), whose sum is σ = 198065664. Its totient is φ = 65964900.

The previous prime is 131986781. The next prime is 131986817. The reversal of 131986786 is 687689131.

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

It is not an unprimeable number, because it can be changed into a prime (131986781) 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, 7890 + ... + 18061.

It is an arithmetic number, because the mean of its divisors is an integer number (24758208).

Almost surely, 2^131986786 is an apocalyptic number.

131986786 is a deficient number, since it is larger than the sum of its proper divisors (66078878).

131986786 is a wasteful number, since it uses less digits than its factorization.

131986786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28496.

The product of its digits is 435456, while the sum is 49.

The square root of 131986786 is about 11488.5502131470. The cubic root of 131986786 is about 509.1473462537.

The spelling of 131986786 in words is "one hundred thirty-one million, nine hundred eighty-six thousand, seven hundred eighty-six".