5021728949 has 2 divisors, whose sum is σ = 5021728950. Its totient is φ = 5021728948.

The previous prime is 5021728909. The next prime is 5021728961. The reversal of 5021728949 is 9498271205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3295908100 + 1725820849 = 57410^2 + 41543^2 .

It is a cyclic number.

It is not a de Polignac number, because 5021728949 - 2¹² = 5021724853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5021728909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2510864474 + 2510864475.

It is an arithmetic number, because the mean of its divisors is an integer number (2510864475).

Almost surely, 2^5021728949 is an apocalyptic number.

It is an amenable number.

5021728949 is a deficient number, since it is larger than the sum of its proper divisors (1).

5021728949 is an equidigital number, since it uses as much as digits as its factorization.

5021728949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 5021728949 is about 70864.1584229997. The cubic root of 5021728949 is about 1712.4494323889.

The spelling of 5021728949 in words is "five billion, twenty-one million, seven hundred twenty-eight thousand, nine hundred forty-nine".