6729372173 has 2 divisors, whose sum is σ = 6729372174. Its totient is φ = 6729372172.

The previous prime is 6729372163. The next prime is 6729372257. The reversal of 6729372173 is 3712739276.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4371589924 + 2357782249 = 66118^2 + 48557^2 .

It is a cyclic number.

It is not a de Polignac number, because 6729372173 - 2¹⁸ = 6729110029 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6729372163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3364686086 + 3364686087.

It is an arithmetic number, because the mean of its divisors is an integer number (3364686087).

Almost surely, 2^6729372173 is an apocalyptic number.

It is an amenable number.

6729372173 is a deficient number, since it is larger than the sum of its proper divisors (1).

6729372173 is an equidigital number, since it uses as much as digits as its factorization.

6729372173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 666792, while the sum is 47.

The square root of 6729372173 is about 82032.7506121793. The cubic root of 6729372173 is about 1887.9544672247.

The spelling of 6729372173 in words is "six billion, seven hundred twenty-nine million, three hundred seventy-two thousand, one hundred seventy-three".