131708369 has 4 divisors (see below), whose sum is σ = 141839796. Its totient is φ = 121576944.

The previous prime is 131708363. The next prime is 131708371. The reversal of 131708369 is 963807131.

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 15499969 + 116208400 = 3937^2 + 10780^2 .

It is a cyclic number.

It is not a de Polignac number, because 131708369 - 2¹² = 131704273 is a prime.

It is a super-2 number, since 2×131708369² = 34694188929280322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131708363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5065694 + ... + 5065719.

It is an arithmetic number, because the mean of its divisors is an integer number (35459949).

Almost surely, 2^131708369 is an apocalyptic number.

It is an amenable number.

131708369 is a deficient number, since it is larger than the sum of its proper divisors (10131427).

131708369 is a wasteful number, since it uses less digits than its factorization.

131708369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10131426.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 131708369 is about 11476.4266651253. The cubic root of 131708369 is about 508.7890905214.

The spelling of 131708369 in words is "one hundred thirty-one million, seven hundred eight thousand, three hundred sixty-nine".