726240061 has 2 divisors, whose sum is σ = 726240062. Its totient is φ = 726240060.

The previous prime is 726240041. The next prime is 726240083. The reversal of 726240061 is 160042627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631567161 + 94672900 = 25131^2 + 9730^2 .

It is an emirp because it is prime and its reverse (160042627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 726240061 - 2⁷ = 726239933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726240041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363120030 + 363120031.

It is an arithmetic number, because the mean of its divisors is an integer number (363120031).

Almost surely, 2^726240061 is an apocalyptic number.

It is an amenable number.

726240061 is a deficient number, since it is larger than the sum of its proper divisors (1).

726240061 is an equidigital number, since it uses as much as digits as its factorization.

726240061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 726240061 is about 26948.8415520964. The cubic root of 726240061 is about 898.8627862889.

Adding to 726240061 its reverse (160042627), we get a palindrome (886282688).

The spelling of 726240061 in words is "seven hundred twenty-six million, two hundred forty thousand, sixty-one".