728915237 has 2 divisors, whose sum is σ = 728915238. Its totient is φ = 728915236.

The previous prime is 728915227. The next prime is 728915249. The reversal of 728915237 is 732519827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377952481 + 350962756 = 19441^2 + 18734^2 .

It is a cyclic number.

It is not a de Polignac number, because 728915237 - 2¹⁰ = 728914213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728915227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364457618 + 364457619.

It is an arithmetic number, because the mean of its divisors is an integer number (364457619).

Almost surely, 2^728915237 is an apocalyptic number.

It is an amenable number.

728915237 is a deficient number, since it is larger than the sum of its proper divisors (1).

728915237 is an equidigital number, since it uses as much as digits as its factorization.

728915237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 728915237 is about 26998.4302691842. The cubic root of 728915237 is about 899.9651167550.

The spelling of 728915237 in words is "seven hundred twenty-eight million, nine hundred fifteen thousand, two hundred thirty-seven".