28753693 has 2 divisors, whose sum is σ = 28753694. Its totient is φ = 28753692.

The previous prime is 28753691. The next prime is 28753717. The reversal of 28753693 is 39635782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27019204 + 1734489 = 5198^2 + 1317^2 .

It is a cyclic number.

It is not a de Polignac number, because 28753693 - 2¹ = 28753691 is a prime.

It is a super-2 number, since 2×28753693² = 1653549722276498, which contains 22 as substring.

Together with 28753691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28753691) 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, 14376846 + 14376847.

It is an arithmetic number, because the mean of its divisors is an integer number (14376847).

Almost surely, 2^28753693 is an apocalyptic number.

It is an amenable number.

28753693 is a deficient number, since it is larger than the sum of its proper divisors (1).

28753693 is an equidigital number, since it uses as much as digits as its factorization.

28753693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 43.

The square root of 28753693 is about 5362.2470103493. The cubic root of 28753693 is about 306.3594001485.

The spelling of 28753693 in words is "twenty-eight million, seven hundred fifty-three thousand, six hundred ninety-three".