728658943 has 2 divisors, whose sum is σ = 728658944. Its totient is φ = 728658942.

The previous prime is 728658923. The next prime is 728658971. The reversal of 728658943 is 349856827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728658943 - 2¹³ = 728650751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728658923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364329471 + 364329472.

It is an arithmetic number, because the mean of its divisors is an integer number (364329472).

Almost surely, 2^728658943 is an apocalyptic number.

728658943 is a deficient number, since it is larger than the sum of its proper divisors (1).

728658943 is an equidigital number, since it uses as much as digits as its factorization.

728658943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 52.

The square root of 728658943 is about 26993.6833907490. The cubic root of 728658943 is about 899.8596254318.

The spelling of 728658943 in words is "seven hundred twenty-eight million, six hundred fifty-eight thousand, nine hundred forty-three".