50018129 has 16 divisors (see below), whose sum is σ = 58164480. Its totient is φ = 42129600.

The previous prime is 50018119. The next prime is 50018161. The reversal of 50018129 is 92181005.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 50018129 - 2⁸ = 50017873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50018098 and 50018107.

It is not an unprimeable number, because it can be changed into a prime (50018119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185807 + ... + 186075.

It is an arithmetic number, because the mean of its divisors is an integer number (3635280).

Almost surely, 2^50018129 is an apocalyptic number.

It is an amenable number.

50018129 is a deficient number, since it is larger than the sum of its proper divisors (8146351).

50018129 is a wasteful number, since it uses less digits than its factorization.

50018129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 50018129 is about 7072.3496095711. The cubic root of 50018129 is about 368.4476696885.

The spelling of 50018129 in words is "fifty million, eighteen thousand, one hundred twenty-nine".