52720399 has 2 divisors, whose sum is σ = 52720400. Its totient is φ = 52720398.

The previous prime is 52720387. The next prime is 52720403. The reversal of 52720399 is 99302725.

52720399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52720399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52720309) 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, 26360199 + 26360200.

It is an arithmetic number, because the mean of its divisors is an integer number (26360200).

Almost surely, 2^52720399 is an apocalyptic number.

52720399 is a deficient number, since it is larger than the sum of its proper divisors (1).

52720399 is an equidigital number, since it uses as much as digits as its factorization.

52720399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 52720399 is about 7260.8814203236. The cubic root of 52720399 is about 374.9668687766.

The spelling of 52720399 in words is "fifty-two million, seven hundred twenty thousand, three hundred ninety-nine".