728464821937 has 2 divisors, whose sum is σ = 728464821938. Its totient is φ = 728464821936.

The previous prime is 728464821923. The next prime is 728464821941. The reversal of 728464821937 is 739128464827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 484143206416 + 244321615521 = 695804^2 + 494289^2 .

It is an emirp because it is prime and its reverse (739128464827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728464821937 - 2²³ = 728456433329 is a prime.

It is not a weakly prime, because it can be changed into another prime (728464821907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364232410968 + 364232410969.

It is an arithmetic number, because the mean of its divisors is an integer number (364232410969).

Almost surely, 2^728464821937 is an apocalyptic number.

It is an amenable number.

728464821937 is a deficient number, since it is larger than the sum of its proper divisors (1).

728464821937 is an equidigital number, since it uses as much as digits as its factorization.

728464821937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32514048, while the sum is 61.

The spelling of 728464821937 in words is "seven hundred twenty-eight billion, four hundred sixty-four million, eight hundred twenty-one thousand, nine hundred thirty-seven".