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130719 = 343573
BaseRepresentation
bin11111111010011111
320122022110
4133322133
513140334
62445103
71053051
oct377237
9218273
10130719
118a236
1263793
1347664
14358d1
1528ae9
hex1fe9f

130719 has 4 divisors (see below), whose sum is σ = 174296. Its totient is φ = 87144.

The previous prime is 130699. The next prime is 130729. The reversal of 130719 is 917031.

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

It is not a de Polignac number, because 130719 - 25 = 130687 is a prime.

It is a super-2 number, since 2×1307192 = 34174913922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130695 and 130704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130729) 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, 21784 + ... + 21789.

It is an arithmetic number, because the mean of its divisors is an integer number (43574).

2130719 is an apocalyptic number.

130719 is a deficient number, since it is larger than the sum of its proper divisors (43577).

130719 is an equidigital number, since it uses as much as digits as its factorization.

130719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43576.

The product of its (nonzero) digits is 189, while the sum is 21.

The square root of 130719 is about 361.5508263025. The cubic root of 130719 is about 50.7511910549.

It can be divided in two parts, 1307 and 19, that added together give a triangular number (1326 = T51).

The spelling of 130719 in words is "one hundred thirty thousand, seven hundred nineteen".

Divisors: 1 3 43573 130719