52728391 has 2 divisors, whose sum is σ = 52728392. Its totient is φ = 52728390.

The previous prime is 52728383. The next prime is 52728451. The reversal of 52728391 is 19382725.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 52728391 - 2³ = 52728383 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52728391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52728311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26364195 + 26364196.

It is an arithmetic number, because the mean of its divisors is an integer number (26364196).

Almost surely, 2^52728391 is an apocalyptic number.

52728391 is a deficient number, since it is larger than the sum of its proper divisors (1).

52728391 is an equidigital number, since it uses as much as digits as its factorization.

52728391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 52728391 is about 7261.4317458749. The cubic root of 52728391 is about 374.9858151672.

The spelling of 52728391 in words is "fifty-two million, seven hundred twenty-eight thousand, three hundred ninety-one".