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191297 is a prime number
BaseRepresentation
bin101110101101000001
3100201102002
4232231001
522110142
64033345
71424501
oct565501
9321362
10191297
111207a7
1292855
13690c2
144da01
153ba32
hex2eb41

191297 has 2 divisors, whose sum is σ = 191298. Its totient is φ = 191296.

The previous prime is 191281. The next prime is 191299. The reversal of 191297 is 792191.

191297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152881 + 38416 = 391^2 + 196^2 .

It is a cyclic number.

It is not a de Polignac number, because 191297 - 24 = 191281 is a prime.

Together with 191299, 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 (191299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95648 + 95649.

It is an arithmetic number, because the mean of its divisors is an integer number (95649).

2191297 is an apocalyptic number.

It is an amenable number.

191297 is a deficient number, since it is larger than the sum of its proper divisors (1).

191297 is an equidigital number, since it uses as much as digits as its factorization.

191297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 29.

The square root of 191297 is about 437.3751250357. The cubic root of 191297 is about 57.6194868801.

It can be divided in two parts, 19129 and 7, that multiplied together give a triangular number (133903 = T517).

The spelling of 191297 in words is "one hundred ninety-one thousand, two hundred ninety-seven".