50399 has 4 divisors (see below), whose sum is σ = 51000. Its totient is φ = 49800.

The previous prime is 50387. The next prime is 50411. The reversal of 50399 is 99305.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99305 = 5 ⋅19861.

It is an interprime number because it is at equal distance from previous prime (50387) and next prime (50411).

It is a cyclic number.

It is not a de Polignac number, because 50399 - 2⁴ = 50383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50329) 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, 149 + ... + 350.

It is an arithmetic number, because the mean of its divisors is an integer number (12750).

2⁵⁰³⁹⁹ is an apocalyptic number.

50399 is a deficient number, since it is larger than the sum of its proper divisors (601).

50399 is a wasteful number, since it uses less digits than its factorization.

50399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600.

The product of its (nonzero) digits is 1215, while the sum is 26.

The square root of 50399 is about 224.4972160184. The cubic root of 50399 is about 36.9380507064.

The spelling of 50399 in words is "fifty thousand, three hundred ninety-nine".