50403721 has 2 divisors, whose sum is σ = 50403722. Its totient is φ = 50403720.

The previous prime is 50403679. The next prime is 50403739. The reversal of 50403721 is 12730405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26010000 + 24393721 = 5100^2 + 4939^2 .

It is a cyclic number.

It is not a de Polignac number, because 50403721 - 2⁹ = 50403209 is a prime.

It is equal to p_3023842 and since 50403721 and 3023842 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 50403692 and 50403701.

It is not a weakly prime, because it can be changed into another prime (50403781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25201860 + 25201861.

It is an arithmetic number, because the mean of its divisors is an integer number (25201861).

Almost surely, 2^50403721 is an apocalyptic number.

It is an amenable number.

50403721 is a deficient number, since it is larger than the sum of its proper divisors (1).

50403721 is an equidigital number, since it uses as much as digits as its factorization.

50403721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 50403721 is about 7099.5578031311. The cubic root of 50403721 is about 369.3920403021.

The spelling of 50403721 in words is "fifty million, four hundred three thousand, seven hundred twenty-one".