28209301 has 2 divisors, whose sum is σ = 28209302. Its totient is φ = 28209300.

The previous prime is 28209299. The next prime is 28209329. The reversal of 28209301 is 10390282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14326225 + 13883076 = 3785^2 + 3726^2 .

It is a cyclic number.

It is not a de Polignac number, because 28209301 - 2¹ = 28209299 is a prime.

Together with 28209299, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28206301) 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, 14104650 + 14104651.

It is an arithmetic number, because the mean of its divisors is an integer number (14104651).

Almost surely, 2^28209301 is an apocalyptic number.

It is an amenable number.

28209301 is a deficient number, since it is larger than the sum of its proper divisors (1).

28209301 is an equidigital number, since it uses as much as digits as its factorization.

28209301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 28209301 is about 5311.2428865568. The cubic root of 28209301 is about 304.4136400902.

Adding to 28209301 its reverse (10390282), we get a palindrome (38599583).

It can be divided in two parts, 2820 and 9301, that added together give a palindrome (12121).

The spelling of 28209301 in words is "twenty-eight million, two hundred nine thousand, three hundred one".