131920123 has 2 divisors, whose sum is σ = 131920124. Its totient is φ = 131920122.

The previous prime is 131920091. The next prime is 131920163. The reversal of 131920123 is 321029131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131920123 - 2⁵ = 131920091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131920094 and 131920103.

It is not a weakly prime, because it can be changed into another prime (131920163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65960061 + 65960062.

It is an arithmetic number, because the mean of its divisors is an integer number (65960062).

Almost surely, 2^131920123 is an apocalyptic number.

131920123 is a deficient number, since it is larger than the sum of its proper divisors (1).

131920123 is an equidigital number, since it uses as much as digits as its factorization.

131920123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 131920123 is about 11485.6485667985. The cubic root of 131920123 is about 509.0616129100.

Adding to 131920123 its reverse (321029131), we get a palindrome (452949254).

The spelling of 131920123 in words is "one hundred thirty-one million, nine hundred twenty thousand, one hundred twenty-three".