728537 has 2 divisors, whose sum is σ = 728538. Its totient is φ = 728536.

The previous prime is 728527. The next prime is 728551. The reversal of 728537 is 735827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373321 + 355216 = 611^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 728537 - 2⁴ = 728521 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 728537.

It is not a weakly prime, because it can be changed into another prime (728527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364268 + 364269.

It is an arithmetic number, because the mean of its divisors is an integer number (364269).

2⁷²⁸⁵³⁷ is an apocalyptic number.

It is an amenable number.

728537 is a deficient number, since it is larger than the sum of its proper divisors (1).

728537 is an equidigital number, since it uses as much as digits as its factorization.

728537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 32.

The square root of 728537 is about 853.5437891520. The cubic root of 728537 is about 89.9809424669.

The spelling of 728537 in words is "seven hundred twenty-eight thousand, five hundred thirty-seven".