728650061 has 2 divisors, whose sum is σ = 728650062. Its totient is φ = 728650060.

The previous prime is 728650049. The next prime is 728650079. The reversal of 728650061 is 160056827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655872100 + 72777961 = 25610^2 + 8531^2 .

It is a cyclic number.

It is not a de Polignac number, because 728650061 - 2⁶ = 728649997 is a prime.

It is a super-2 number, since 2×728650061² = 1061861822790607442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728650001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364325030 + 364325031.

It is an arithmetic number, because the mean of its divisors is an integer number (364325031).

Almost surely, 2^728650061 is an apocalyptic number.

It is an amenable number.

728650061 is a deficient number, since it is larger than the sum of its proper divisors (1).

728650061 is an equidigital number, since it uses as much as digits as its factorization.

728650061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 728650061 is about 26993.5188702770. The cubic root of 728650061 is about 899.8559691324.

The spelling of 728650061 in words is "seven hundred twenty-eight million, six hundred fifty thousand, sixty-one".