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24391 is a prime number
BaseRepresentation
bin101111101000111
31020110101
411331013
51240031
6304531
7131053
oct57507
936411
1024391
1117364
1212147
13b143
148c63
157361
hex5f47

24391 has 2 divisors, whose sum is σ = 24392. Its totient is φ = 24390.

The previous prime is 24379. The next prime is 24407. The reversal of 24391 is 19342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 24391 - 25 = 24359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12195 + 12196.

It is an arithmetic number, because the mean of its divisors is an integer number (12196).

224391 is an apocalyptic number.

24391 is a deficient number, since it is larger than the sum of its proper divisors (1).

24391 is an equidigital number, since it uses as much as digits as its factorization.

24391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 24391 is about 156.1761825632. The cubic root of 24391 is about 29.0007926854. Note that the first 3 decimals are identical.

The spelling of 24391 in words is "twenty-four thousand, three hundred ninety-one".