28133797 has 2 divisors, whose sum is σ = 28133798. Its totient is φ = 28133796.

The previous prime is 28133789. The next prime is 28133839. The reversal of 28133797 is 79733182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21585316 + 6548481 = 4646^2 + 2559^2 .

It is a cyclic number.

It is not a de Polignac number, because 28133797 - 2³ = 28133789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28133197) 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, 14066898 + 14066899.

It is an arithmetic number, because the mean of its divisors is an integer number (14066899).

Almost surely, 2^28133797 is an apocalyptic number.

It is an amenable number.

28133797 is a deficient number, since it is larger than the sum of its proper divisors (1).

28133797 is an equidigital number, since it uses as much as digits as its factorization.

28133797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 28133797 is about 5304.1301831686. The cubic root of 28133797 is about 304.1418032177.

The spelling of 28133797 in words is "twenty-eight million, one hundred thirty-three thousand, seven hundred ninety-seven".