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23947 = 711311
BaseRepresentation
bin101110110001011
31012211221
411312023
51231242
6302511
7126550
oct56613
935757
1023947
1116aa0
1211a37
13ab91
148a27
157167
hex5d8b

23947 has 8 divisors (see below), whose sum is σ = 29952. Its totient is φ = 18600.

The previous prime is 23929. The next prime is 23957. The reversal of 23947 is 74932.

It can be divided in two parts, 2394 and 7, that added together give a 4-th power (2401 = 74).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23947 - 27 = 23819 is a prime.

It is a d-powerful number, because it can be written as 27 + 37 + 93 + 46 + 75 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79 + ... + 232.

It is an arithmetic number, because the mean of its divisors is an integer number (3744).

223947 is an apocalyptic number.

23947 is a deficient number, since it is larger than the sum of its proper divisors (6005).

23947 is a wasteful number, since it uses less digits than its factorization.

23947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329.

The product of its digits is 1512, while the sum is 25.

The square root of 23947 is about 154.7481825418. The cubic root of 23947 is about 28.8237426383.

The spelling of 23947 in words is "twenty-three thousand, nine hundred forty-seven".

Divisors: 1 7 11 77 311 2177 3421 23947