5009821 has 2 divisors, whose sum is σ = 5009822. Its totient is φ = 5009820.

The previous prime is 5009803. The next prime is 5009839. The reversal of 5009821 is 1289005.

It is a balanced prime because it is at equal distance from previous prime (5009803) and next prime (5009839).

It can be written as a sum of positive squares in only one way, i.e., 4347225 + 662596 = 2085^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 5009821 - 2¹³ = 5001629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5009881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2504910 + 2504911.

It is an arithmetic number, because the mean of its divisors is an integer number (2504911).

Almost surely, 2^5009821 is an apocalyptic number.

It is an amenable number.

5009821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5009821 is an equidigital number, since it uses as much as digits as its factorization.

5009821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 5009821 is about 2238.2629425517. The cubic root of 5009821 is about 171.1094792702.

The spelling of 5009821 in words is "five million, nine thousand, eight hundred twenty-one".