131783969 has 4 divisors (see below), whose sum is σ = 132446400. Its totient is φ = 131121540.

The previous prime is 131783941. The next prime is 131783987. The reversal of 131783969 is 969387131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131783969 - 2¹² = 131779873 is a prime.

It is a super-2 number, since 2×131783969² = 34734028970785922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131783669) 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, 330917 + ... + 331314.

It is an arithmetic number, because the mean of its divisors is an integer number (33111600).

Almost surely, 2^131783969 is an apocalyptic number.

It is an amenable number.

131783969 is a deficient number, since it is larger than the sum of its proper divisors (662431).

131783969 is an equidigital number, since it uses as much as digits as its factorization.

131783969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662430.

The product of its digits is 244944, while the sum is 47.

The square root of 131783969 is about 11479.7199007641. The cubic root of 131783969 is about 508.8864194368.

The spelling of 131783969 in words is "one hundred thirty-one million, seven hundred eighty-three thousand, nine hundred sixty-nine".