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117191 is a prime number
BaseRepresentation
bin11100100111000111
312221202102
4130213013
512222231
62302315
7665444
oct344707
9187672
10117191
1180058
125799b
1341459
14309cb
1524acb
hex1c9c7

117191 has 2 divisors, whose sum is σ = 117192. Its totient is φ = 117190.

The previous prime is 117167. The next prime is 117193. The reversal of 117191 is 191711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117191 - 26 = 117127 is a prime.

It is a Sophie Germain prime.

Together with 117193, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 12.

It is a nialpdrome in base 7.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58595 + 58596.

It is an arithmetic number, because the mean of its divisors is an integer number (58596).

2117191 is an apocalyptic number.

117191 is a deficient number, since it is larger than the sum of its proper divisors (1).

117191 is an equidigital number, since it uses as much as digits as its factorization.

117191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63, while the sum is 20.

The square root of 117191 is about 342.3317104798. The cubic root of 117191 is about 48.9363326933.

The spelling of 117191 in words is "one hundred seventeen thousand, one hundred ninety-one".