28593493 has 2 divisors, whose sum is σ = 28593494. Its totient is φ = 28593492.

The previous prime is 28593463. The next prime is 28593517. The reversal of 28593493 is 39439582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24621444 + 3972049 = 4962^2 + 1993^2 .

It is a cyclic number.

It is not a de Polignac number, because 28593493 - 2²¹ = 26496341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28593463) 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, 14296746 + 14296747.

It is an arithmetic number, because the mean of its divisors is an integer number (14296747).

Almost surely, 2^28593493 is an apocalyptic number.

It is an amenable number.

28593493 is a deficient number, since it is larger than the sum of its proper divisors (1).

28593493 is an equidigital number, since it uses as much as digits as its factorization.

28593493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 28593493 is about 5347.2883782343. The cubic root of 28593493 is about 305.7893840250.

The spelling of 28593493 in words is "twenty-eight million, five hundred ninety-three thousand, four hundred ninety-three".