131205329 has 4 divisors (see below), whose sum is σ = 131768676. Its totient is φ = 130641984.

The previous prime is 131205323. The next prime is 131205359. The reversal of 131205329 is 923502131.

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 54169600 + 77035729 = 7360^2 + 8777^2 .

It is a cyclic number.

It is not a de Polignac number, because 131205329 - 2⁸ = 131205073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131205298 and 131205307.

It is not an unprimeable number, because it can be changed into a prime (131205323) 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, 281324 + ... + 281789.

It is an arithmetic number, because the mean of its divisors is an integer number (32942169).

Almost surely, 2^131205329 is an apocalyptic number.

It is an amenable number.

131205329 is a deficient number, since it is larger than the sum of its proper divisors (563347).

131205329 is an equidigital number, since it uses as much as digits as its factorization.

131205329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563346.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 131205329 is about 11454.4894691994. The cubic root of 131205329 is about 508.1405167012.

The spelling of 131205329 in words is "one hundred thirty-one million, two hundred five thousand, three hundred twenty-nine".