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189691 is a prime number
BaseRepresentation
bin101110010011111011
3100122012121
4232103323
522032231
64022111
71420015
oct562373
9318177
10189691
1111a577
1291937
1368458
144d1b5
153b311
hex2e4fb

189691 has 2 divisors, whose sum is σ = 189692. Its totient is φ = 189690.

The previous prime is 189671. The next prime is 189697. The reversal of 189691 is 196981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189691 - 213 = 181499 is a prime.

It is not a weakly prime, because it can be changed into another prime (189697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94845 + 94846.

It is an arithmetic number, because the mean of its divisors is an integer number (94846).

2189691 is an apocalyptic number.

189691 is a deficient number, since it is larger than the sum of its proper divisors (1).

189691 is an equidigital number, since it uses as much as digits as its factorization.

189691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 34.

The square root of 189691 is about 435.5353028171. The cubic root of 189691 is about 57.4577888058.

The spelling of 189691 in words is "one hundred eighty-nine thousand, six hundred ninety-one".