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23969 = 112179
BaseRepresentation
bin101110110100001
31012212202
411312201
51231334
6302545
7126611
oct56641
935782
1023969
1117010
1211a55
13abaa
148a41
15717e
hex5da1

23969 has 4 divisors (see below), whose sum is σ = 26160. Its totient is φ = 21780.

The previous prime is 23957. The next prime is 23971. The reversal of 23969 is 96932.

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.

It is a de Polignac number, because none of the positive numbers 2k-23969 is a prime.

It is a super-2 number, since 2×239692 = 1149025922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23909) 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, 1079 + ... + 1100.

It is an arithmetic number, because the mean of its divisors is an integer number (6540).

223969 is an apocalyptic number.

It is an amenable number.

23969 is a deficient number, since it is larger than the sum of its proper divisors (2191).

23969 is a wasteful number, since it uses less digits than its factorization.

23969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190.

The product of its digits is 2916, while the sum is 29.

The square root of 23969 is about 154.8192494492. The cubic root of 23969 is about 28.8325666838.

The spelling of 23969 in words is "twenty-three thousand, nine hundred sixty-nine".

Divisors: 1 11 2179 23969