28917194593 has 4 divisors (see below), whose sum is σ = 33048222400. Its totient is φ = 24786166788.

The previous prime is 28917194591. The next prime is 28917194617. The reversal of 28917194593 is 39549171982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39549171982 = 2 ⋅19774585991.

It is a cyclic number.

It is not a de Polignac number, because 28917194593 - 2¹ = 28917194591 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28917194591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2065513893 + ... + 2065513906.

It is an arithmetic number, because the mean of its divisors is an integer number (8262055600).

Almost surely, 2^28917194593 is an apocalyptic number.

It is an amenable number.

28917194593 is a deficient number, since it is larger than the sum of its proper divisors (4131027807).

28917194593 is an equidigital number, since it uses as much as digits as its factorization.

28917194593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4131027806.

The product of its digits is 4898880, while the sum is 58.

The spelling of 28917194593 in words is "twenty-eight billion, nine hundred seventeen million, one hundred ninety-four thousand, five hundred ninety-three".