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143913 = 3721189
BaseRepresentation
bin100011001000101001
321022102010
4203020221
514101123
63030133
71136400
oct431051
9238363
10143913
1199140
126b349
1350673
143a637
152c993
hex23229

143913 has 24 divisors (see below), whose sum is σ = 246240. Its totient is φ = 73920.

The previous prime is 143909. The next prime is 143947. The reversal of 143913 is 319341.

It is not a de Polignac number, because 143913 - 22 = 143909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

143913 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 143913.

It is not an unprimeable number, because it can be changed into a prime (143953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1573 + ... + 1661.

It is an arithmetic number, because the mean of its divisors is an integer number (10260).

2143913 is an apocalyptic number.

It is an amenable number.

143913 is a deficient number, since it is larger than the sum of its proper divisors (102327).

143913 is a wasteful number, since it uses less digits than its factorization.

143913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 110 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

The square root of 143913 is about 379.3586693355. The cubic root of 143913 is about 52.4042699937.

The spelling of 143913 in words is "one hundred forty-three thousand, nine hundred thirteen".

Divisors: 1 3 7 11 21 33 49 77 89 147 231 267 539 623 979 1617 1869 2937 4361 6853 13083 20559 47971 143913