28171943983 has 2 divisors, whose sum is σ = 28171943984. Its totient is φ = 28171943982.

The previous prime is 28171943959. The next prime is 28171944049. The reversal of 28171943983 is 38934917182.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28171943983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28171943923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14085971991 + 14085971992.

It is an arithmetic number, because the mean of its divisors is an integer number (14085971992).

Almost surely, 2^28171943983 is an apocalyptic number.

28171943983 is a deficient number, since it is larger than the sum of its proper divisors (1).

28171943983 is an equidigital number, since it uses as much as digits as its factorization.

28171943983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 55.

The spelling of 28171943983 in words is "twenty-eight billion, one hundred seventy-one million, nine hundred forty-three thousand, nine hundred eighty-three".