28977632797 has 2 divisors, whose sum is σ = 28977632798. Its totient is φ = 28977632796.

The previous prime is 28977632779. The next prime is 28977632809. The reversal of 28977632797 is 79723677982.

Together with previous prime (28977632779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25224110041 + 3753522756 = 158821^2 + 61266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28977632797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28977632737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14488816398 + 14488816399.

It is an arithmetic number, because the mean of its divisors is an integer number (14488816399).

Almost surely, 2^28977632797 is an apocalyptic number.

It is an amenable number.

28977632797 is a deficient number, since it is larger than the sum of its proper divisors (1).

28977632797 is an equidigital number, since it uses as much as digits as its factorization.

28977632797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112021056, while the sum is 67.

The spelling of 28977632797 in words is "twenty-eight billion, nine hundred seventy-seven million, six hundred thirty-two thousand, seven hundred ninety-seven".