50406721 has 2 divisors, whose sum is σ = 50406722. Its totient is φ = 50406720.

The previous prime is 50406703. The next prime is 50406749. The reversal of 50406721 is 12760405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39753025 + 10653696 = 6305^2 + 3264^2 .

It is a cyclic number.

It is not a de Polignac number, because 50406721 - 2⁵ = 50406689 is a prime.

It is not a weakly prime, because it can be changed into another prime (50406761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25203360 + 25203361.

It is an arithmetic number, because the mean of its divisors is an integer number (25203361).

Almost surely, 2^50406721 is an apocalyptic number.

It is an amenable number.

50406721 is a deficient number, since it is larger than the sum of its proper divisors (1).

50406721 is an equidigital number, since it uses as much as digits as its factorization.

50406721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 50406721 is about 7099.7690807519. The cubic root of 50406721 is about 369.3993688228.

The spelling of 50406721 in words is "fifty million, four hundred six thousand, seven hundred twenty-one".