50787921 has 8 divisors (see below), whose sum is σ = 67762240. Its totient is φ = 33836112.

The previous prime is 50787917. The next prime is 50787953. The reversal of 50787921 is 12978705.

50787921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 50787921 - 2² = 50787917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50787921.

It is not an unprimeable number, because it can be changed into a prime (50787221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636 + ... + 10098.

It is an arithmetic number, because the mean of its divisors is an integer number (8470280).

Almost surely, 2^50787921 is an apocalyptic number.

It is an amenable number.

50787921 is a deficient number, since it is larger than the sum of its proper divisors (16974319).

50787921 is a wasteful number, since it uses less digits than its factorization.

50787921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11255.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 50787921 is about 7126.5644598221. The cubic root of 50787921 is about 370.3282234809.

The spelling of 50787921 in words is "fifty million, seven hundred eighty-seven thousand, nine hundred twenty-one".