28317203 has 2 divisors, whose sum is σ = 28317204. Its totient is φ = 28317202.

The previous prime is 28317199. The next prime is 28317217. The reversal of 28317203 is 30271382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28317203 - 2² = 28317199 is a prime.

It is not a weakly prime, because it can be changed into another prime (28317283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14158601 + 14158602.

It is an arithmetic number, because the mean of its divisors is an integer number (14158602).

Almost surely, 2^28317203 is an apocalyptic number.

28317203 is a deficient number, since it is larger than the sum of its proper divisors (1).

28317203 is an equidigital number, since it uses as much as digits as its factorization.

28317203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 28317203 is about 5321.3910775285. The cubic root of 28317203 is about 304.8012787759.

Adding to 28317203 its reverse (30271382), we get a palindrome (58588585).

The spelling of 28317203 in words is "twenty-eight million, three hundred seventeen thousand, two hundred three".