Search a number
30187 is a prime number
BaseRepresentation
bin111010111101011
31112102001
413113223
51431222
6351431
7154003
oct72753
945361
1030187
1120753
1215577
1310981
14b003
158e27
hex75eb

30187 has 2 divisors, whose sum is σ = 30188. Its totient is φ = 30186.

The previous prime is 30181. The next prime is 30197. The reversal of 30187 is 78103.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30187 - 27 = 30059 is a prime.

It is a super-2 number, since 2×301872 = 1822509938, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (30181) 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, 15093 + 15094.

It is an arithmetic number, because the mean of its divisors is an integer number (15094).

230187 is an apocalyptic number.

30187 is a deficient number, since it is larger than the sum of its proper divisors (1).

30187 is an equidigital number, since it uses as much as digits as its factorization.

30187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 30187 is about 173.7440646468. The cubic root of 30187 is about 31.1367527645.

It can be divided in two parts, 3018 and 7, that added together give a square (3025 = 552).

The spelling of 30187 in words is "thirty thousand, one hundred eighty-seven".