187040197 has 2 divisors, whose sum is σ = 187040198. Its totient is φ = 187040196.

The previous prime is 187040177. The next prime is 187040219. The reversal of 187040197 is 791040781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163865601 + 23174596 = 12801^2 + 4814^2 .

It is a cyclic number.

It is not a de Polignac number, because 187040197 - 2¹¹ = 187038149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187040177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93520098 + 93520099.

It is an arithmetic number, because the mean of its divisors is an integer number (93520099).

Almost surely, 2^187040197 is an apocalyptic number.

It is an amenable number.

187040197 is a deficient number, since it is larger than the sum of its proper divisors (1).

187040197 is an equidigital number, since it uses as much as digits as its factorization.

187040197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 187040197 is about 13676.2640000842. The cubic root of 187040197 is about 571.8888778302. Note that the first 4 decimals are identical.

The spelling of 187040197 in words is "one hundred eighty-seven million, forty thousand, one hundred ninety-seven".