28413313 has 2 divisors, whose sum is σ = 28413314. Its totient is φ = 28413312.

The previous prime is 28413311. The next prime is 28413317. The reversal of 28413313 is 31331482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18122049 + 10291264 = 4257^2 + 3208^2 .

It is a cyclic number.

It is not a de Polignac number, because 28413313 - 2¹ = 28413311 is a prime.

Together with 28413311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28413311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14206656 + 14206657.

It is an arithmetic number, because the mean of its divisors is an integer number (14206657).

Almost surely, 2^28413313 is an apocalyptic number.

It is an amenable number.

28413313 is a deficient number, since it is larger than the sum of its proper divisors (1).

28413313 is an equidigital number, since it uses as much as digits as its factorization.

28413313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 28413313 is about 5330.4139614105. The cubic root of 28413313 is about 305.1457262952.

Adding to 28413313 its reverse (31331482), we get a palindrome (59744795).

The spelling of 28413313 in words is "twenty-eight million, four hundred thirteen thousand, three hundred thirteen".