50038721 has 4 divisors (see below), whose sum is σ = 50052912. Its totient is φ = 50024532.

The previous prime is 50038699. The next prime is 50038757. The reversal of 50038721 is 12783005.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50038721 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 (50038421) 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, 2726 + ... + 10368.

It is an arithmetic number, because the mean of its divisors is an integer number (12513228).

Almost surely, 2^50038721 is an apocalyptic number.

It is an amenable number.

50038721 is a deficient number, since it is larger than the sum of its proper divisors (14191).

50038721 is an equidigital number, since it uses as much as digits as its factorization.

50038721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14190.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 50038721 is about 7073.8052701499. The cubic root of 50038721 is about 368.4982249147.

The spelling of 50038721 in words is "fifty million, thirty-eight thousand, seven hundred twenty-one".