28475313917 has 2 divisors, whose sum is σ = 28475313918. Its totient is φ = 28475313916.

The previous prime is 28475313913. The next prime is 28475313941. The reversal of 28475313917 is 71931357482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27007964281 + 1467349636 = 164341^2 + 38306^2 .

It is a cyclic number.

It is not a de Polignac number, because 28475313917 - 2² = 28475313913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28475313913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14237656958 + 14237656959.

It is an arithmetic number, because the mean of its divisors is an integer number (14237656959).

Almost surely, 2^28475313917 is an apocalyptic number.

It is an amenable number.

28475313917 is a deficient number, since it is larger than the sum of its proper divisors (1).

28475313917 is an equidigital number, since it uses as much as digits as its factorization.

28475313917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 50.

The spelling of 28475313917 in words is "twenty-eight billion, four hundred seventy-five million, three hundred thirteen thousand, nine hundred seventeen".