28858617173 has 2 divisors, whose sum is σ = 28858617174. Its totient is φ = 28858617172.

The previous prime is 28858617127. The next prime is 28858617181. The reversal of 28858617173 is 37171685882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17850830449 + 11007786724 = 133607^2 + 104918^2 .

It is a cyclic number.

It is not a de Polignac number, because 28858617173 - 2²⁶ = 28791508309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28858617773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14429308586 + 14429308587.

It is an arithmetic number, because the mean of its divisors is an integer number (14429308587).

Almost surely, 2^28858617173 is an apocalyptic number.

It is an amenable number.

28858617173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28858617173 is an equidigital number, since it uses as much as digits as its factorization.

28858617173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 56.

The spelling of 28858617173 in words is "twenty-eight billion, eight hundred fifty-eight million, six hundred seventeen thousand, one hundred seventy-three".