131069986 has 4 divisors (see below), whose sum is σ = 196604982. Its totient is φ = 65534992.

The previous prime is 131069909. The next prime is 131069987. The reversal of 131069986 is 689960131.

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

It can be written as a sum of positive squares in only one way, i.e., 71487025 + 59582961 = 8455^2 + 7719^2 .

It is not an unprimeable number, because it can be changed into a prime (131069987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32767495 + ... + 32767498.

Almost surely, 2^131069986 is an apocalyptic number.

131069986 is a deficient number, since it is larger than the sum of its proper divisors (65534996).

131069986 is an equidigital number, since it uses as much as digits as its factorization.

131069986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65534995.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 131069986 is about 11448.5800866308. The cubic root of 131069986 is about 507.9657348703.

The spelling of 131069986 in words is "one hundred thirty-one million, sixty-nine thousand, nine hundred eighty-six".