50813729 has 4 divisors (see below), whose sum is σ = 51280020. Its totient is φ = 50347440.

The previous prime is 50813701. The next prime is 50813747. The reversal of 50813729 is 92731805.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34492129 + 16321600 = 5873^2 + 4040^2 .

It is a cyclic number.

It is not a de Polignac number, because 50813729 - 2¹⁶ = 50748193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50815729) 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, 232982 + ... + 233199.

It is an arithmetic number, because the mean of its divisors is an integer number (12820005).

Almost surely, 2^50813729 is an apocalyptic number.

It is an amenable number.

50813729 is a deficient number, since it is larger than the sum of its proper divisors (466291).

50813729 is a wasteful number, since it uses less digits than its factorization.

50813729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466290.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 50813729 is about 7128.3749199940. The cubic root of 50813729 is about 370.3909405744.

The spelling of 50813729 in words is "fifty million, eight hundred thirteen thousand, seven hundred twenty-nine".