Search a number
-
+
195917 = 1071831
BaseRepresentation
bin101111110101001101
3100221202012
4233311031
522232132
64111005
71444121
oct576515
9327665
10195917
11124217
1295465
136b237
1451581
153d0b2
hex2fd4d

195917 has 4 divisors (see below), whose sum is σ = 197856. Its totient is φ = 193980.

The previous prime is 195913. The next prime is 195919. The reversal of 195917 is 719591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 719591 = 4117551.

It is a cyclic number.

It is not a de Polignac number, because 195917 - 22 = 195913 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 195917.

It is not an unprimeable number, because it can be changed into a prime (195913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809 + ... + 1022.

It is an arithmetic number, because the mean of its divisors is an integer number (49464).

2195917 is an apocalyptic number.

It is an amenable number.

195917 is a deficient number, since it is larger than the sum of its proper divisors (1939).

195917 is a wasteful number, since it uses less digits than its factorization.

195917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938.

The product of its digits is 2835, while the sum is 32.

The square root of 195917 is about 442.6251235527. The cubic root of 195917 is about 58.0796567015.

The spelling of 195917 in words is "one hundred ninety-five thousand, nine hundred seventeen".

Divisors: 1 107 1831 195917