28783123 has 2 divisors, whose sum is σ = 28783124. Its totient is φ = 28783122.

The previous prime is 28783121. The next prime is 28783141. The reversal of 28783123 is 32138782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28783123 - 2¹ = 28783121 is a prime.

Together with 28783121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28783121) 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, 14391561 + 14391562.

It is an arithmetic number, because the mean of its divisors is an integer number (14391562).

Almost surely, 2^28783123 is an apocalyptic number.

28783123 is a deficient number, since it is larger than the sum of its proper divisors (1).

28783123 is an equidigital number, since it uses as much as digits as its factorization.

28783123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 28783123 is about 5364.9904939338. The cubic root of 28783123 is about 306.4638862380.

The spelling of 28783123 in words is "twenty-eight million, seven hundred eighty-three thousand, one hundred twenty-three".