131970869 has 4 divisors (see below), whose sum is σ = 131997996. Its totient is φ = 131943744.

The previous prime is 131970859. The next prime is 131970871. The reversal of 131970869 is 968079131.

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 97278769 + 34692100 = 9863^2 + 5890^2 .

It is a cyclic number.

It is not a de Polignac number, because 131970869 - 2⁸ = 131970613 is a prime.

It is a super-2 number, since 2×131970869² = 34832620529230322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131970809) 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, 4034 + ... + 16739.

It is an arithmetic number, because the mean of its divisors is an integer number (32999499).

Almost surely, 2^131970869 is an apocalyptic number.

It is an amenable number.

131970869 is a deficient number, since it is larger than the sum of its proper divisors (27127).

131970869 is an equidigital number, since it uses as much as digits as its factorization.

131970869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27126.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 131970869 is about 11487.8574590739. The cubic root of 131970869 is about 509.1268784873.

The spelling of 131970869 in words is "one hundred thirty-one million, nine hundred seventy thousand, eight hundred sixty-nine".