131028187 has 2 divisors, whose sum is σ = 131028188. Its totient is φ = 131028186.

The previous prime is 131028173. The next prime is 131028193. The reversal of 131028187 is 781820131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131028187 - 2¹⁹ = 130503899 is a prime.

It is not a weakly prime, because it can be changed into another prime (131028127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65514093 + 65514094.

It is an arithmetic number, because the mean of its divisors is an integer number (65514094).

Almost surely, 2^131028187 is an apocalyptic number.

131028187 is a deficient number, since it is larger than the sum of its proper divisors (1).

131028187 is an equidigital number, since it uses as much as digits as its factorization.

131028187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 131028187 is about 11446.7544308420. The cubic root of 131028187 is about 507.9117313621.

The spelling of 131028187 in words is "one hundred thirty-one million, twenty-eight thousand, one hundred eighty-seven".