728514091 has 2 divisors, whose sum is σ = 728514092. Its totient is φ = 728514090.

The previous prime is 728514071. The next prime is 728514113. The reversal of 728514091 is 190415827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728514091 - 2⁷ = 728513963 is a prime.

It is equal to p_37651672 and since 728514091 and 37651672 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 728514091.

It is not a weakly prime, because it can be changed into another prime (728514071) 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, 364257045 + 364257046.

It is an arithmetic number, because the mean of its divisors is an integer number (364257046).

Almost surely, 2^728514091 is an apocalyptic number.

728514091 is a deficient number, since it is larger than the sum of its proper divisors (1).

728514091 is an equidigital number, since it uses as much as digits as its factorization.

728514091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 728514091 is about 26991.0001852469. Note that the first 3 decimals coincide. The cubic root of 728514091 is about 899.7999930043.

The spelling of 728514091 in words is "seven hundred twenty-eight million, five hundred fourteen thousand, ninety-one".