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BaseRepresentation
bin111010111110101
31112102102
413113311
51431242
6351445
7154016
oct72765
945372
1030197
1120762
1215585
131098b
14b00d
158e32
hex75f5

30197 has 2 divisors, whose sum is σ = 30198. Its totient is φ = 30196.

The previous prime is 30187. The next prime is 30203. The reversal of 30197 is 79103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22801 + 7396 = 151^2 + 86^2 .

It is an emirp because it is prime and its reverse (79103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30197 - 24 = 30181 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30137) 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, 15098 + 15099.

It is an arithmetic number, because the mean of its divisors is an integer number (15099).

230197 is an apocalyptic number.

It is an amenable number.

30197 is a deficient number, since it is larger than the sum of its proper divisors (1).

30197 is an equidigital number, since it uses as much as digits as its factorization.

30197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189, while the sum is 20.

The square root of 30197 is about 173.7728402254. The cubic root of 30197 is about 31.1401905926.

The spelling of 30197 in words is "thirty thousand, one hundred ninety-seven".