187920163 has 2 divisors, whose sum is σ = 187920164. Its totient is φ = 187920162.

The previous prime is 187920149. The next prime is 187920181. The reversal of 187920163 is 361029781.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187920163 is a prime.

It is not a weakly prime, because it can be changed into another prime (187920113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93960081 + 93960082.

It is an arithmetic number, because the mean of its divisors is an integer number (93960082).

Almost surely, 2^187920163 is an apocalyptic number.

187920163 is a deficient number, since it is larger than the sum of its proper divisors (1).

187920163 is an equidigital number, since it uses as much as digits as its factorization.

187920163 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 37.

The square root of 187920163 is about 13708.3975358172. The cubic root of 187920163 is about 572.7843281707.

The spelling of 187920163 in words is "one hundred eighty-seven million, nine hundred twenty thousand, one hundred sixty-three".