28394998526393 has 2 divisors, whose sum is σ = 28394998526394. Its totient is φ = 28394998526392.

The previous prime is 28394998526353. The next prime is 28394998526491. The reversal of 28394998526393 is 39362589949382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25716136347664 + 2678862178729 = 5071108^2 + 1636723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28394998526393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28394998526333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14197499263196 + 14197499263197.

It is an arithmetic number, because the mean of its divisors is an integer number (14197499263197).

Almost surely, 2^{28394998526393} is an apocalyptic number.

It is an amenable number.

28394998526393 is a deficient number, since it is larger than the sum of its proper divisors (1).

28394998526393 is an equidigital number, since it uses as much as digits as its factorization.

28394998526393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5441955840, while the sum is 80.

The spelling of 28394998526393 in words is "twenty-eight trillion, three hundred ninety-four billion, nine hundred ninety-eight million, five hundred twenty-six thousand, three hundred ninety-three".