728061401 has 2 divisors, whose sum is σ = 728061402. Its totient is φ = 728061400.

The previous prime is 728061379. The next prime is 728061403. The reversal of 728061401 is 104160827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 459888025 + 268173376 = 21445^2 + 16376^2 .

It is a cyclic number.

It is not a de Polignac number, because 728061401 - 2²² = 723867097 is a prime.

Together with 728061403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (728061403) 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, 364030700 + 364030701.

It is an arithmetic number, because the mean of its divisors is an integer number (364030701).

Almost surely, 2^728061401 is an apocalyptic number.

It is an amenable number.

728061401 is a deficient number, since it is larger than the sum of its proper divisors (1).

728061401 is an equidigital number, since it uses as much as digits as its factorization.

728061401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 728061401 is about 26982.6129387055. The cubic root of 728061401 is about 899.6135793791.

The spelling of 728061401 in words is "seven hundred twenty-eight million, sixty-one thousand, four hundred one".