5021609 has 2 divisors, whose sum is σ = 5021610. Its totient is φ = 5021608.

The previous prime is 5021587. The next prime is 5021633. The reversal of 5021609 is 9061205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3258025 + 1763584 = 1805^2 + 1328^2 .

It is a cyclic number.

It is not a de Polignac number, because 5021609 - 2¹² = 5017513 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5021209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2510804 + 2510805.

It is an arithmetic number, because the mean of its divisors is an integer number (2510805).

Almost surely, 2^5021609 is an apocalyptic number.

It is an amenable number.

5021609 is a deficient number, since it is larger than the sum of its proper divisors (1).

5021609 is an equidigital number, since it uses as much as digits as its factorization.

5021609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 5021609 is about 2240.8946873961. The cubic root of 5021609 is about 171.2435797760.

The spelling of 5021609 in words is "five million, twenty-one thousand, six hundred nine".