729188461 has 2 divisors, whose sum is σ = 729188462. Its totient is φ = 729188460.

The previous prime is 729188437. The next prime is 729188491. The reversal of 729188461 is 164881927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 673402500 + 55785961 = 25950^2 + 7469^2 .

It is a cyclic number.

It is not a de Polignac number, because 729188461 - 2⁷ = 729188333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729188401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364594230 + 364594231.

It is an arithmetic number, because the mean of its divisors is an integer number (364594231).

Almost surely, 2^729188461 is an apocalyptic number.

It is an amenable number.

729188461 is a deficient number, since it is larger than the sum of its proper divisors (1).

729188461 is an equidigital number, since it uses as much as digits as its factorization.

729188461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 46.

The square root of 729188461 is about 27003.4897929879. The cubic root of 729188461 is about 900.0775492848.

The spelling of 729188461 in words is "seven hundred twenty-nine million, one hundred eighty-eight thousand, four hundred sixty-one".