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19313 = 73189
BaseRepresentation
bin100101101110001
3222111022
410231301
51104223
6225225
7110210
oct45561
928438
1019313
1113568
12b215
138a38
147077
155ac8
hex4b71

19313 has 8 divisors (see below), whose sum is σ = 23040. Its totient is φ = 15840.

The previous prime is 19309. The next prime is 19319. The reversal of 19313 is 31391.

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

It is a cyclic number.

It is not a de Polignac number, because 19313 - 22 = 19309 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 19291 and 19300.

It is not an unprimeable number, because it can be changed into a prime (19319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173 + ... + 261.

It is an arithmetic number, because the mean of its divisors is an integer number (2880).

219313 is an apocalyptic number.

It is an amenable number.

19313 is a deficient number, since it is larger than the sum of its proper divisors (3727).

19313 is an equidigital number, since it uses as much as digits as its factorization.

19313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127.

The product of its digits is 81, while the sum is 17.

The square root of 19313 is about 138.9712200421. The cubic root of 19313 is about 26.8297471728.

The spelling of 19313 in words is "nineteen thousand, three hundred thirteen".

Divisors: 1 7 31 89 217 623 2759 19313