28305934997 has 2 divisors, whose sum is σ = 28305934998. Its totient is φ = 28305934996.

The previous prime is 28305934991. The next prime is 28305935029. The reversal of 28305934997 is 79943950382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26448842161 + 1857092836 = 162631^2 + 43094^2 .

It is a cyclic number.

It is not a de Polignac number, because 28305934997 - 2¹⁶ = 28305869461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28305934991) 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, 14152967498 + 14152967499.

It is an arithmetic number, because the mean of its divisors is an integer number (14152967499).

Almost surely, 2^28305934997 is an apocalyptic number.

It is an amenable number.

28305934997 is a deficient number, since it is larger than the sum of its proper divisors (1).

28305934997 is an equidigital number, since it uses as much as digits as its factorization.

28305934997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14696640, while the sum is 59.

The spelling of 28305934997 in words is "twenty-eight billion, three hundred five million, nine hundred thirty-four thousand, nine hundred ninety-seven".