28341993997 has 2 divisors, whose sum is σ = 28341993998. Its totient is φ = 28341993996.

The previous prime is 28341993991. The next prime is 28341994039. The reversal of 28341993997 is 79939914382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26601936201 + 1740057796 = 163101^2 + 41714^2 .

It is a cyclic number.

It is not a de Polignac number, because 28341993997 - 2²³ = 28333605389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28341993991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14170996998 + 14170996999.

It is an arithmetic number, because the mean of its divisors is an integer number (14170996999).

Almost surely, 2^28341993997 is an apocalyptic number.

It is an amenable number.

28341993997 is a deficient number, since it is larger than the sum of its proper divisors (1).

28341993997 is an equidigital number, since it uses as much as digits as its factorization.

28341993997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26453952, while the sum is 64.

The spelling of 28341993997 in words is "twenty-eight billion, three hundred forty-one million, nine hundred ninety-three thousand, nine hundred ninety-seven".