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161047 is a prime number
BaseRepresentation
bin100111010100010111
322011220201
4213110113
520123142
63241331
71240345
oct472427
9264821
10161047
11aaaa7
1279247
13583c3
1442995
1532ab7
hex27517

161047 has 2 divisors, whose sum is σ = 161048. Its totient is φ = 161046.

The previous prime is 161039. The next prime is 161053. The reversal of 161047 is 740161.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (740161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161047 - 23 = 161039 is a prime.

It is a super-2 number, since 2×1610472 = 51872272418, which contains 22 as substring.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80523 + 80524.

It is an arithmetic number, because the mean of its divisors is an integer number (80524).

161047 is a Friedman number, since it can be written as 11^(6-7^0)-4, using all its digits and the basic arithmetic operations.

2161047 is an apocalyptic number.

161047 is a deficient number, since it is larger than the sum of its proper divisors (1).

161047 is an equidigital number, since it uses as much as digits as its factorization.

161047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 161047 is about 401.3066159435. The cubic root of 161047 is about 54.4065114394.

Subtracting from 161047 its sum of digits (19), we obtain a triangular number (161028 = T567).

The spelling of 161047 in words is "one hundred sixty-one thousand, forty-seven".