729374861 has 2 divisors, whose sum is σ = 729374862. Its totient is φ = 729374860.

The previous prime is 729374837. The next prime is 729374879. The reversal of 729374861 is 168473927.

729374861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 562164100 + 167210761 = 23710^2 + 12931^2 .

It is a cyclic number.

It is not a de Polignac number, because 729374861 - 2¹⁰ = 729373837 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 (729374881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364687430 + 364687431.

It is an arithmetic number, because the mean of its divisors is an integer number (364687431).

Almost surely, 2^729374861 is an apocalyptic number.

It is an amenable number.

729374861 is a deficient number, since it is larger than the sum of its proper divisors (1).

729374861 is an equidigital number, since it uses as much as digits as its factorization.

729374861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 47.

The square root of 729374861 is about 27006.9409782004. The cubic root of 729374861 is about 900.1542373521.

The spelling of 729374861 in words is "seven hundred twenty-nine million, three hundred seventy-four thousand, eight hundred sixty-one".