131193123 has 4 divisors (see below), whose sum is σ = 174924168. Its totient is φ = 87462080.

The previous prime is 131193109. The next prime is 131193133. The reversal of 131193123 is 321391131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321391131 = 3 ⋅107130377.

It is a cyclic number.

It is not a de Polignac number, because 131193123 - 2⁴ = 131193107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131193093 and 131193102.

It is not an unprimeable number, because it can be changed into a prime (131193133) 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, 21865518 + ... + 21865523.

It is an arithmetic number, because the mean of its divisors is an integer number (43731042).

Almost surely, 2^131193123 is an apocalyptic number.

131193123 is a deficient number, since it is larger than the sum of its proper divisors (43731045).

131193123 is an equidigital number, since it uses as much as digits as its factorization.

131193123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43731044.

The product of its digits is 486, while the sum is 24.

The square root of 131193123 is about 11453.9566526157. The cubic root of 131193123 is about 508.1247588161.

The spelling of 131193123 in words is "one hundred thirty-one million, one hundred ninety-three thousand, one hundred twenty-three".