28717145783 has 2 divisors, whose sum is σ = 28717145784. Its totient is φ = 28717145782.

The previous prime is 28717145759. The next prime is 28717145797. The reversal of 28717145783 is 38754171782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28717145783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28717145683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14358572891 + 14358572892.

It is an arithmetic number, because the mean of its divisors is an integer number (14358572892).

Almost surely, 2^28717145783 is an apocalyptic number.

28717145783 is a deficient number, since it is larger than the sum of its proper divisors (1).

28717145783 is an equidigital number, since it uses as much as digits as its factorization.

28717145783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2634240, while the sum is 53.

The spelling of 28717145783 in words is "twenty-eight billion, seven hundred seventeen million, one hundred forty-five thousand, seven hundred eighty-three".