28297970677 has 2 divisors, whose sum is σ = 28297970678. Its totient is φ = 28297970676.

The previous prime is 28297970671. The next prime is 28297970681. The reversal of 28297970677 is 77607979282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17574539761 + 10723430916 = 132569^2 + 103554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28297970677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28297970671) 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, 14148985338 + 14148985339.

It is an arithmetic number, because the mean of its divisors is an integer number (14148985339).

Almost surely, 2^28297970677 is an apocalyptic number.

It is an amenable number.

28297970677 is a deficient number, since it is larger than the sum of its proper divisors (1).

28297970677 is an equidigital number, since it uses as much as digits as its factorization.

28297970677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37340352, while the sum is 64.

The spelling of 28297970677 in words is "twenty-eight billion, two hundred ninety-seven million, nine hundred seventy thousand, six hundred seventy-seven".