729702173 has 2 divisors, whose sum is σ = 729702174. Its totient is φ = 729702172.

The previous prime is 729702167. The next prime is 729702241. The reversal of 729702173 is 371207927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 729702169 + 4 = 27013^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 729702173 - 2⁶ = 729702109 is a prime.

It is a super-2 number, since 2×729702173² = 1064930522561843858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729708173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364851086 + 364851087.

It is an arithmetic number, because the mean of its divisors is an integer number (364851087).

Almost surely, 2^729702173 is an apocalyptic number.

It is an amenable number.

729702173 is a deficient number, since it is larger than the sum of its proper divisors (1).

729702173 is an equidigital number, since it uses as much as digits as its factorization.

729702173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 729702173 is about 27013.0000740384. Note that the first 4 decimals coincide. The cubic root of 729702173 is about 900.2888673564.

The spelling of 729702173 in words is "seven hundred twenty-nine million, seven hundred two thousand, one hundred seventy-three".