28977042197 has 2 divisors, whose sum is σ = 28977042198. Its totient is φ = 28977042196.

The previous prime is 28977042167. The next prime is 28977042203. The reversal of 28977042197 is 79124077982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28669601041 + 307441156 = 169321^2 + 17534^2 .

It is a cyclic number.

It is not a de Polignac number, because 28977042197 - 2⁸ = 28977041941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28977042167) 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, 14488521098 + 14488521099.

It is an arithmetic number, because the mean of its divisors is an integer number (14488521099).

Almost surely, 2^28977042197 is an apocalyptic number.

It is an amenable number.

28977042197 is a deficient number, since it is larger than the sum of its proper divisors (1).

28977042197 is an equidigital number, since it uses as much as digits as its factorization.

28977042197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3556224, while the sum is 56.

The spelling of 28977042197 in words is "twenty-eight billion, nine hundred seventy-seven million, forty-two thousand, one hundred ninety-seven".