728464821971 has 2 divisors, whose sum is σ = 728464821972. Its totient is φ = 728464821970.

The previous prime is 728464821941. The next prime is 728464821989. The reversal of 728464821971 is 179128464827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728464821971 - 2⁶ = 728464821907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 728464821971.

It is not a weakly prime, because it can be changed into another prime (728464821901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364232410985 + 364232410986.

It is an arithmetic number, because the mean of its divisors is an integer number (364232410986).

Almost surely, 2^728464821971 is an apocalyptic number.

728464821971 is a deficient number, since it is larger than the sum of its proper divisors (1).

728464821971 is an equidigital number, since it uses as much as digits as its factorization.

728464821971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10838016, while the sum is 59.

The spelling of 728464821971 in words is "seven hundred twenty-eight billion, four hundred sixty-four million, eight hundred twenty-one thousand, nine hundred seventy-one".