131694769 has 4 divisors (see below), whose sum is σ = 132068196. Its totient is φ = 131321344.

The previous prime is 131694751. The next prime is 131694811. The reversal of 131694769 is 967496131.

It is a happy number.

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 95550625 + 36144144 = 9775^2 + 6012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131694769 is a prime.

It is a super-2 number, since 2×131694769² = 34687024363926722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131694749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186184 + ... + 186889.

It is an arithmetic number, because the mean of its divisors is an integer number (33017049).

Almost surely, 2^131694769 is an apocalyptic number.

It is an amenable number.

131694769 is a deficient number, since it is larger than the sum of its proper divisors (373427).

131694769 is an equidigital number, since it uses as much as digits as its factorization.

131694769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373426.

The product of its digits is 244944, while the sum is 46.

The square root of 131694769 is about 11475.8341309031. The cubic root of 131694769 is about 508.7715776636.

The spelling of 131694769 in words is "one hundred thirty-one million, six hundred ninety-four thousand, seven hundred sixty-nine".