28317931843 has 2 divisors, whose sum is σ = 28317931844. Its totient is φ = 28317931842.

The previous prime is 28317931813. The next prime is 28317931909. The reversal of 28317931843 is 34813971382.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28317931843 is a prime.

It is not a weakly prime, because it can be changed into another prime (28317931813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14158965921 + 14158965922.

It is an arithmetic number, because the mean of its divisors is an integer number (14158965922).

Almost surely, 2^28317931843 is an apocalyptic number.

28317931843 is a deficient number, since it is larger than the sum of its proper divisors (1).

28317931843 is an equidigital number, since it uses as much as digits as its factorization.

28317931843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The spelling of 28317931843 in words is "twenty-eight billion, three hundred seventeen million, nine hundred thirty-one thousand, eight hundred forty-three".