50129729 has 4 divisors (see below), whose sum is σ = 53985876. Its totient is φ = 46273584.

The previous prime is 50129707. The next prime is 50129747. The reversal of 50129729 is 92792105.

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 5880625 + 44249104 = 2425^2 + 6652^2 .

It is a cyclic number.

It is not a de Polignac number, because 50129729 - 2¹⁶ = 50064193 is a prime.

It is a super-2 number, since 2×50129729² = 5025979459226882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50129749) 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, 1928054 + ... + 1928079.

It is an arithmetic number, because the mean of its divisors is an integer number (13496469).

Almost surely, 2^50129729 is an apocalyptic number.

It is an amenable number.

50129729 is a deficient number, since it is larger than the sum of its proper divisors (3856147).

50129729 is a wasteful number, since it uses less digits than its factorization.

50129729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856146.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 50129729 is about 7080.2350949668. The cubic root of 50129729 is about 368.7214918495.

It can be divided in two parts, 5012 and 9729, that added together give a palindrome (14741).

The spelling of 50129729 in words is "fifty million, one hundred twenty-nine thousand, seven hundred twenty-nine".