131345869 has 4 divisors (see below), whose sum is σ = 131380480. Its totient is φ = 131311260.

The previous prime is 131345867. The next prime is 131345887. The reversal of 131345869 is 968543131.

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 131345869 - 2¹ = 131345867 is a prime.

It is a super-2 number, since 2×131345869² = 34503474606730322, 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 (131345867) 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, 10797 + ... + 19474.

It is an arithmetic number, because the mean of its divisors is an integer number (32845120).

Almost surely, 2^131345869 is an apocalyptic number.

It is an amenable number.

131345869 is a deficient number, since it is larger than the sum of its proper divisors (34611).

131345869 is an equidigital number, since it uses as much as digits as its factorization.

131345869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34610.

The product of its digits is 77760, while the sum is 40.

The square root of 131345869 is about 11460.6225398100. The cubic root of 131345869 is about 508.3218827723.

The spelling of 131345869 in words is "one hundred thirty-one million, three hundred forty-five thousand, eight hundred sixty-nine".