728273279 has 2 divisors, whose sum is σ = 728273280. Its totient is φ = 728273278.

The previous prime is 728273267. The next prime is 728273281. The reversal of 728273279 is 972372827.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (972372827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728273279 - 2¹⁶ = 728207743 is a prime.

Together with 728273281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728273209) 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, 364136639 + 364136640.

It is an arithmetic number, because the mean of its divisors is an integer number (364136640).

Almost surely, 2^728273279 is an apocalyptic number.

728273279 is a deficient number, since it is larger than the sum of its proper divisors (1).

728273279 is an equidigital number, since it uses as much as digits as its factorization.

728273279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 47.

The square root of 728273279 is about 26986.5388480998. The cubic root of 728273279 is about 899.7008384293.

The spelling of 728273279 in words is "seven hundred twenty-eight million, two hundred seventy-three thousand, two hundred seventy-nine".