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131723 = 157839
BaseRepresentation
bin100000001010001011
320200200122
4200022023
513203343
62453455
71056014
oct401213
9220618
10131723
118aa69
126428b
1347c57
143600b
1529068
hex2028b

131723 has 4 divisors (see below), whose sum is σ = 132720. Its totient is φ = 130728.

The previous prime is 131713. The next prime is 131731. The reversal of 131723 is 327131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 131723 - 24 = 131707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131713) 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, 263 + ... + 576.

It is an arithmetic number, because the mean of its divisors is an integer number (33180).

2131723 is an apocalyptic number.

131723 is a deficient number, since it is larger than the sum of its proper divisors (997).

131723 is an equidigital number, since it uses as much as digits as its factorization.

131723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996.

The product of its digits is 126, while the sum is 17.

The square root of 131723 is about 362.9366335877. The cubic root of 131723 is about 50.8807929662.

Adding to 131723 its reverse (327131), we get a palindrome (458854).

The spelling of 131723 in words is "one hundred thirty-one thousand, seven hundred twenty-three".

Divisors: 1 157 839 131723