50865389 has 4 divisors (see below), whose sum is σ = 52506240. Its totient is φ = 49224540.

The previous prime is 50865383. The next prime is 50865427. The reversal of 50865389 is 98356805.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98356805 = 5 ⋅19671361.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50865389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50865383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820379 + ... + 820440.

It is an arithmetic number, because the mean of its divisors is an integer number (13126560).

Almost surely, 2^50865389 is an apocalyptic number.

It is an amenable number.

50865389 is a deficient number, since it is larger than the sum of its proper divisors (1640851).

50865389 is a wasteful number, since it uses less digits than its factorization.

50865389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640850.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 50865389 is about 7131.9975462699. The cubic root of 50865389 is about 370.5164179187.

The spelling of 50865389 in words is "fifty million, eight hundred sixty-five thousand, three hundred eighty-nine".