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191138 = 295569
BaseRepresentation
bin101110101010100010
3100201012012
4232222202
522104023
64032522
71424153
oct565242
9321165
10191138
11120672
1292742
1368ccc
144d92a
153b978
hex2eaa2

191138 has 4 divisors (see below), whose sum is σ = 286710. Its totient is φ = 95568.

The previous prime is 191137. The next prime is 191141. The reversal of 191138 is 831191.

191138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 190969 + 169 = 437^2 + 13^2 .

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47783 + ... + 47786.

2191138 is an apocalyptic number.

191138 is a deficient number, since it is larger than the sum of its proper divisors (95572).

191138 is an equidigital number, since it uses as much as digits as its factorization.

191138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95571.

The product of its digits is 216, while the sum is 23.

The square root of 191138 is about 437.1933210835. The cubic root of 191138 is about 57.6035186251.

The spelling of 191138 in words is "one hundred ninety-one thousand, one hundred thirty-eight".

Divisors: 1 2 95569 191138