187066091 has 2 divisors, whose sum is σ = 187066092. Its totient is φ = 187066090.

The previous prime is 187066081. The next prime is 187066093. The reversal of 187066091 is 190660781.

It is a strong prime.

It is an emirp because it is prime and its reverse (190660781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 187066091 - 2⁶ = 187066027 is a prime.

Together with 187066093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (187066093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93533045 + 93533046.

It is an arithmetic number, because the mean of its divisors is an integer number (93533046).

Almost surely, 2^187066091 is an apocalyptic number.

187066091 is a deficient number, since it is larger than the sum of its proper divisors (1).

187066091 is an equidigital number, since it uses as much as digits as its factorization.

187066091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 187066091 is about 13677.2106439873. The cubic root of 187066091 is about 571.9152675359.

The spelling of 187066091 in words is "one hundred eighty-seven million, sixty-six thousand, ninety-one".