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130789 = 314219
BaseRepresentation
bin11111111011100101
320122102001
4133323211
513141124
62445301
71053211
oct377345
9218361
10130789
118a29a
1263831
13476b9
1435941
1528b44
hex1fee5

130789 has 4 divisors (see below), whose sum is σ = 135040. Its totient is φ = 126540.

The previous prime is 130787. The next prime is 130807. The reversal of 130789 is 987031.

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: 987031 = 1951949.

It is a cyclic number.

It is not a de Polignac number, because 130789 - 21 = 130787 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 (130783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2079 + ... + 2140.

It is an arithmetic number, because the mean of its divisors is an integer number (33760).

2130789 is an apocalyptic number.

It is an amenable number.

130789 is a deficient number, since it is larger than the sum of its proper divisors (4251).

130789 is an equidigital number, since it uses as much as digits as its factorization.

130789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 130789 is about 361.6476185460. The cubic root of 130789 is about 50.7602485228.

It can be divided in two parts, 130 and 789, that added together give a palindrome (919).

The spelling of 130789 in words is "one hundred thirty thousand, seven hundred eighty-nine".

Divisors: 1 31 4219 130789