28909103 has 2 divisors, whose sum is σ = 28909104. Its totient is φ = 28909102.

The previous prime is 28909079. The next prime is 28909109. The reversal of 28909103 is 30190982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28909103 - 2⁶ = 28909039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28909103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28909109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14454551 + 14454552.

It is an arithmetic number, because the mean of its divisors is an integer number (14454552).

Almost surely, 2^28909103 is an apocalyptic number.

28909103 is a deficient number, since it is larger than the sum of its proper divisors (1).

28909103 is an equidigital number, since it uses as much as digits as its factorization.

28909103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 28909103 is about 5376.7186089659. The cubic root of 28909103 is about 306.9103530684.

The spelling of 28909103 in words is "twenty-eight million, nine hundred nine thousand, one hundred three".