131028173 has 2 divisors, whose sum is σ = 131028174. Its totient is φ = 131028172.

The previous prime is 131028127. The next prime is 131028187. The reversal of 131028173 is 371820131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81775849 + 49252324 = 9043^2 + 7018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131028173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131028113) 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 as a sum of consecutive naturals, namely, 65514086 + 65514087.

It is an arithmetic number, because the mean of its divisors is an integer number (65514087).

Almost surely, 2^131028173 is an apocalyptic number.

It is an amenable number.

131028173 is a deficient number, since it is larger than the sum of its proper divisors (1).

131028173 is an equidigital number, since it uses as much as digits as its factorization.

131028173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 131028173 is about 11446.7538193149. The cubic root of 131028173 is about 507.9117132724.

The spelling of 131028173 in words is "one hundred thirty-one million, twenty-eight thousand, one hundred seventy-three".