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29191 is a prime number
BaseRepresentation
bin111001000000111
31111001011
413020013
51413231
6343051
7151051
oct71007
944034
1029191
111aa28
1214a87
1310396
14a8d1
1589b1
hex7207

29191 has 2 divisors, whose sum is σ = 29192. Its totient is φ = 29190.

The previous prime is 29179. The next prime is 29201. The reversal of 29191 is 19192.

29191 = T138 + T139 + T140.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 29191 - 27 = 29063 is a prime.

It is a super-2 number, since 2×291912 = 1704228962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14595 + 14596.

It is an arithmetic number, because the mean of its divisors is an integer number (14596).

229191 is an apocalyptic number.

29191 is the 140-th centered triangular number.

29191 is a deficient number, since it is larger than the sum of its proper divisors (1).

29191 is an equidigital number, since it uses as much as digits as its factorization.

29191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162, while the sum is 22.

The square root of 29191 is about 170.8537386187. The cubic root of 29191 is about 30.7904704313.

Subtracting from 29191 its reverse (19192), we obtain a palindrome (9999).

The spelling of 29191 in words is "twenty-nine thousand, one hundred ninety-one".