131863539 has 4 divisors (see below), whose sum is σ = 175818056. Its totient is φ = 87909024.

The previous prime is 131863519. The next prime is 131863547. The reversal of 131863539 is 935368131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 131863539 - 2⁵ = 131863507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131863497 and 131863506.

It is not an unprimeable number, because it can be changed into a prime (131863519) 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, 21977254 + ... + 21977259.

It is an arithmetic number, because the mean of its divisors is an integer number (43954514).

Almost surely, 2^131863539 is an apocalyptic number.

131863539 is a deficient number, since it is larger than the sum of its proper divisors (43954517).

131863539 is an equidigital number, since it uses as much as digits as its factorization.

131863539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43954516.

The product of its digits is 58320, while the sum is 39.

The square root of 131863539 is about 11483.1850546789. The cubic root of 131863539 is about 508.9888192098.

The spelling of 131863539 in words is "one hundred thirty-one million, eight hundred sixty-three thousand, five hundred thirty-nine".