131613123 has 16 divisors (see below), whose sum is σ = 177376640. Its totient is φ = 86800896.

The previous prime is 131613121. The next prime is 131613161. The reversal of 131613123 is 321316131.

It is not a de Polignac number, because 131613123 - 2¹ = 131613121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131613123.

It is not an unprimeable number, because it can be changed into a prime (131613121) 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 15 ways as a sum of consecutive naturals, for example, 227811 + ... + 228387.

It is an arithmetic number, because the mean of its divisors is an integer number (11086040).

Almost surely, 2^131613123 is an apocalyptic number.

131613123 is a deficient number, since it is larger than the sum of its proper divisors (45763517).

131613123 is a wasteful number, since it uses less digits than its factorization.

131613123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266.

The product of its digits is 324, while the sum is 21.

The square root of 131613123 is about 11472.2762780540. The cubic root of 131613123 is about 508.6664159280. Note that the first 3 decimals are identical.

Adding to 131613123 its reverse (321316131), we get a palindrome (452929254).

The spelling of 131613123 in words is "one hundred thirty-one million, six hundred thirteen thousand, one hundred twenty-three".