Search a number
-
+
2138379 = 317231823
BaseRepresentation
bin1000001010000100001011
311000122022020
420022010023
51021412004
6113455523
724114225
oct10120413
94018266
102138379
111230661
128715a3
1359b419
143d9415
152c38d9
hex20a10b

2138379 has 16 divisors (see below), whose sum is σ = 3151872. Its totient is φ = 1282688.

The previous prime is 2138377. The next prime is 2138387. The reversal of 2138379 is 9738312.

Multipling 2138379 by its sum of digits (33), we get a palindrome (70566507).

It is a cyclic number.

It is not a de Polignac number, because 2138379 - 21 = 2138377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2138371) 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 15 ways as a sum of consecutive naturals, for example, 262 + ... + 2084.

It is an arithmetic number, because the mean of its divisors is an integer number (196992).

22138379 is an apocalyptic number.

2138379 is the 782-nd nonagonal number.

2138379 is a deficient number, since it is larger than the sum of its proper divisors (1013493).

2138379 is a wasteful number, since it uses less digits than its factorization.

2138379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866.

The product of its digits is 9072, while the sum is 33.

The square root of 2138379 is about 1462.3197324799. The cubic root of 2138379 is about 128.8333284056.

The spelling of 2138379 in words is "two million, one hundred thirty-eight thousand, three hundred seventy-nine".

Divisors: 1 3 17 23 51 69 391 1173 1823 5469 30991 41929 92973 125787 712793 2138379