28963771117 has 2 divisors, whose sum is σ = 28963771118. Its totient is φ = 28963771116.

The previous prime is 28963771021. The next prime is 28963771241. The reversal of 28963771117 is 71117736982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28417193476 + 546577641 = 168574^2 + 23379^2 .

It is a cyclic number.

It is not a de Polignac number, because 28963771117 - 2⁷ = 28963770989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28963771517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14481885558 + 14481885559.

It is an arithmetic number, because the mean of its divisors is an integer number (14481885559).

Almost surely, 2^28963771117 is an apocalyptic number.

It is an amenable number.

28963771117 is a deficient number, since it is larger than the sum of its proper divisors (1).

28963771117 is an equidigital number, since it uses as much as digits as its factorization.

28963771117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 52.

The spelling of 28963771117 in words is "twenty-eight billion, nine hundred sixty-three million, seven hundred seventy-one thousand, one hundred seventeen".