50009721 has 8 divisors (see below), whose sum is σ = 67029504. Its totient is φ = 33164880.

The previous prime is 50009719. The next prime is 50009737. The reversal of 50009721 is 12790005.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 50009721 - 2¹ = 50009719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50009691 and 50009700.

It is not an unprimeable number, because it can be changed into a prime (50009711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43066 + ... + 44211.

It is an arithmetic number, because the mean of its divisors is an integer number (8378688).

Almost surely, 2^50009721 is an apocalyptic number.

It is an amenable number.

50009721 is a deficient number, since it is larger than the sum of its proper divisors (17019783).

50009721 is a wasteful number, since it uses less digits than its factorization.

50009721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87471.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 50009721 is about 7071.7551569607. The cubic root of 50009721 is about 368.4270232971.

Adding to 50009721 its reverse (12790005), we get a palindrome (62799726).

The spelling of 50009721 in words is "fifty million, nine thousand, seven hundred twenty-one".