2399 has 2 divisors, whose sum is σ = 2400. Its totient is φ = 2398.
The previous prime is 2393. The next prime is 2411. The reversal of 2399 is 9932.
It is a weak prime.
2399 is a truncatable prime.
It is a cyclic number.
It is not a de Polignac number, because 2399 - 24 = 2383 is a prime.
It is a Sophie Germain prime.
2399 is a modest number, since divided by 99 gives 23 as remainder.
It is a plaindrome in base 10, base 12 and base 13.
It is a nialpdrome in base 7.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2393) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1199 + 1200.
It is an arithmetic number, because the mean of its divisors is an integer number (1200).
22399 is an apocalyptic number.
2399 is a deficient number, since it is larger than the sum of its proper divisors (1).
2399 is an equidigital number, since it uses as much as digits as its factorization.
2399 is an evil number, because the sum of its binary digits is even.
The product of its digits is 486, while the sum is 23.
The square root of 2399 is about 48.9795875850. The cubic root of 2399 is about 13.3867992073.
The spelling of 2399 in words is "two thousand, three hundred ninety-nine".
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