28697979683 has 2 divisors, whose sum is σ = 28697979684. Its totient is φ = 28697979682.

The previous prime is 28697979659. The next prime is 28697979691. The reversal of 28697979683 is 38697979682.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28697979683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28697979683.

It is not a weakly prime, because it can be changed into another prime (28697979983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14348989841 + 14348989842.

It is an arithmetic number, because the mean of its divisors is an integer number (14348989842).

Almost surely, 2^28697979683 is an apocalyptic number.

28697979683 is a deficient number, since it is larger than the sum of its proper divisors (1).

28697979683 is an equidigital number, since it uses as much as digits as its factorization.

28697979683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493807104, while the sum is 74.

Subtracting 28697979683 from its reverse (38697979682), we obtain a palindrome (9999999999).

The spelling of 28697979683 in words is "twenty-eight billion, six hundred ninety-seven million, nine hundred seventy-nine thousand, six hundred eighty-three".