28999693493 has 2 divisors, whose sum is σ = 28999693494. Its totient is φ = 28999693492.

The previous prime is 28999693421. The next prime is 28999693523. The reversal of 28999693493 is 39439699982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27849601924 + 1150091569 = 166882^2 + 33913^2 .

It is a cyclic number.

It is not a de Polignac number, because 28999693493 - 2²⁸ = 28731258037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28999693403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14499846746 + 14499846747.

It is an arithmetic number, because the mean of its divisors is an integer number (14499846747).

Almost surely, 2^28999693493 is an apocalyptic number.

It is an amenable number.

28999693493 is a deficient number, since it is larger than the sum of its proper divisors (1).

28999693493 is an equidigital number, since it uses as much as digits as its factorization.

28999693493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204073344, while the sum is 71.

The spelling of 28999693493 in words is "twenty-eight billion, nine hundred ninety-nine million, six hundred ninety-three thousand, four hundred ninety-three".