728213138413 has 2 divisors, whose sum is σ = 728213138414. Its totient is φ = 728213138412.

The previous prime is 728213138363. The next prime is 728213138447. The reversal of 728213138413 is 314831312827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578844029124 + 149369109289 = 760818^2 + 386483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728213138413 is a prime.

It is a super-2 number, since 2×728213138413² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 728213138413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728213138113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364106569206 + 364106569207.

It is an arithmetic number, because the mean of its divisors is an integer number (364106569207).

Almost surely, 2^728213138413 is an apocalyptic number.

It is an amenable number.

728213138413 is a deficient number, since it is larger than the sum of its proper divisors (1).

728213138413 is an equidigital number, since it uses as much as digits as its factorization.

728213138413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The spelling of 728213138413 in words is "seven hundred twenty-eight billion, two hundred thirteen million, one hundred thirty-eight thousand, four hundred thirteen".