131673187 has 2 divisors, whose sum is σ = 131673188. Its totient is φ = 131673186.

The previous prime is 131673169. The next prime is 131673203. The reversal of 131673187 is 781376131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131673187 is a prime.

It is equal to p_7467742 and since 131673187 and 7467742 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (131673107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65836593 + 65836594.

It is an arithmetic number, because the mean of its divisors is an integer number (65836594).

Almost surely, 2^131673187 is an apocalyptic number.

131673187 is a deficient number, since it is larger than the sum of its proper divisors (1).

131673187 is an equidigital number, since it uses as much as digits as its factorization.

131673187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 37.

The square root of 131673187 is about 11474.8937685715. The cubic root of 131673187 is about 508.7437838286.

The spelling of 131673187 in words is "one hundred thirty-one million, six hundred seventy-three thousand, one hundred eighty-seven".