50989921 has 2 divisors, whose sum is σ = 50989922. Its totient is φ = 50989920.

The previous prime is 50989909. The next prime is 50989927. The reversal of 50989921 is 12998905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33223696 + 17766225 = 5764^2 + 4215^2 .

It is a cyclic number.

It is not a de Polignac number, because 50989921 - 2⁵ = 50989889 is a prime.

It is not a weakly prime, because it can be changed into another prime (50989927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25494960 + 25494961.

It is an arithmetic number, because the mean of its divisors is an integer number (25494961).

Almost surely, 2^50989921 is an apocalyptic number.

It is an amenable number.

50989921 is a deficient number, since it is larger than the sum of its proper divisors (1).

50989921 is an equidigital number, since it uses as much as digits as its factorization.

50989921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 50989921 is about 7140.7227225261. The cubic root of 50989921 is about 370.8185457330.

The spelling of 50989921 in words is "fifty million, nine hundred eighty-nine thousand, nine hundred twenty-one".