28719373 has 2 divisors, whose sum is σ = 28719374. Its totient is φ = 28719372.

The previous prime is 28719343. The next prime is 28719389. The reversal of 28719373 is 37391782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25381444 + 3337929 = 5038^2 + 1827^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28719373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28719323) 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, 14359686 + 14359687.

It is an arithmetic number, because the mean of its divisors is an integer number (14359687).

Almost surely, 2^28719373 is an apocalyptic number.

It is an amenable number.

28719373 is a deficient number, since it is larger than the sum of its proper divisors (1).

28719373 is an equidigital number, since it uses as much as digits as its factorization.

28719373 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 28719373 is about 5359.0459038900. The cubic root of 28719373 is about 306.2374628770.

It can be divided in two parts, 28719 and 373, that added together give a palindrome (29092).

The spelling of 28719373 in words is "twenty-eight million, seven hundred nineteen thousand, three hundred seventy-three".