28313503 has 2 divisors, whose sum is σ = 28313504. Its totient is φ = 28313502.

The previous prime is 28313443. The next prime is 28313531. The reversal of 28313503 is 30531382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28313503 - 2¹⁷ = 28182431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28313533) 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, 14156751 + 14156752.

It is an arithmetic number, because the mean of its divisors is an integer number (14156752).

Almost surely, 2^28313503 is an apocalyptic number.

28313503 is a deficient number, since it is larger than the sum of its proper divisors (1).

28313503 is an equidigital number, since it uses as much as digits as its factorization.

28313503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 28313503 is about 5321.0434127152. The cubic root of 28313503 is about 304.7880028195.

Adding to 28313503 its reverse (30531382), we get a palindrome (58844885).

The spelling of 28313503 in words is "twenty-eight million, three hundred thirteen thousand, five hundred three".