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161949 = 3371459
BaseRepresentation
bin100111100010011101
322020011010
4213202131
520140244
63245433
71243104
oct474235
9266133
10161949
11100747
1279879
1358938
144303b
1532eb9
hex2789d

161949 has 8 divisors (see below), whose sum is σ = 221920. Its totient is φ = 104976.

The previous prime is 161947. The next prime is 161957. The reversal of 161949 is 949161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161949 - 21 = 161947 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161947) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619 + ... + 840.

It is an arithmetic number, because the mean of its divisors is an integer number (27740).

2161949 is an apocalyptic number.

It is an amenable number.

161949 is a deficient number, since it is larger than the sum of its proper divisors (59971).

161949 is a wasteful number, since it uses less digits than its factorization.

161949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499.

The product of its digits is 1944, while the sum is 30.

The square root of 161949 is about 402.4288757035. The cubic root of 161949 is about 54.5078966197.

The spelling of 161949 in words is "one hundred sixty-one thousand, nine hundred forty-nine".

Divisors: 1 3 37 111 1459 4377 53983 161949