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133849 = 137977
BaseRepresentation
bin100000101011011001
320210121101
4200223121
513240344
62511401
71065142
oct405331
9223541
10133849
1191621
1265561
1348c01
1436ac9
15299d4
hex20ad9

133849 has 4 divisors (see below), whose sum is σ = 134964. Its totient is φ = 132736.

The previous prime is 133843. The next prime is 133853. The reversal of 133849 is 948331.

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 can be written as a sum of positive squares in 2 ways, for example, as 105625 + 28224 = 325^2 + 168^2 .

It is a cyclic number.

It is not a de Polignac number, because 133849 - 29 = 133337 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133843) 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, 352 + ... + 625.

It is an arithmetic number, because the mean of its divisors is an integer number (33741).

2133849 is an apocalyptic number.

It is an amenable number.

133849 is a deficient number, since it is larger than the sum of its proper divisors (1115).

133849 is an equidigital number, since it uses as much as digits as its factorization.

133849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114.

The product of its digits is 2592, while the sum is 28.

The square root of 133849 is about 365.8537959349. The cubic root of 133849 is about 51.1530708087.

The spelling of 133849 in words is "one hundred thirty-three thousand, eight hundred forty-nine".

Divisors: 1 137 977 133849