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131299 = 718757
BaseRepresentation
bin100000000011100011
320200002221
4200003203
513200144
62451511
71054540
oct400343
9220087
10131299
118a713
1263b97
13479bc
1435bc7
1528d84
hex200e3

131299 has 4 divisors (see below), whose sum is σ = 150064. Its totient is φ = 112536.

The previous prime is 131297. The next prime is 131303. The reversal of 131299 is 992131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131299 - 21 = 131297 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (131293) 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, 9372 + ... + 9385.

It is an arithmetic number, because the mean of its divisors is an integer number (37516).

2131299 is an apocalyptic number.

131299 is a deficient number, since it is larger than the sum of its proper divisors (18765).

131299 is an equidigital number, since it uses as much as digits as its factorization.

131299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18764.

The product of its digits is 486, while the sum is 25.

The square root of 131299 is about 362.3520387689. The cubic root of 131299 is about 50.8261412979.

The spelling of 131299 in words is "one hundred thirty-one thousand, two hundred ninety-nine".

Divisors: 1 7 18757 131299