728672239 has 2 divisors, whose sum is σ = 728672240. Its totient is φ = 728672238.

The previous prime is 728672209. The next prime is 728672257. The reversal of 728672239 is 932276827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728672239 - 2⁷ = 728672111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728672209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364336119 + 364336120.

It is an arithmetic number, because the mean of its divisors is an integer number (364336120).

Almost surely, 2^728672239 is an apocalyptic number.

728672239 is a deficient number, since it is larger than the sum of its proper divisors (1).

728672239 is an equidigital number, since it uses as much as digits as its factorization.

728672239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 728672239 is about 26993.9296694646. The cubic root of 728672239 is about 899.8650987107.

The spelling of 728672239 in words is "seven hundred twenty-eight million, six hundred seventy-two thousand, two hundred thirty-nine".