673165729 has 2 divisors, whose sum is σ = 673165730. Its totient is φ = 673165728.

The previous prime is 673165721. The next prime is 673165733. The reversal of 673165729 is 927561376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671069025 + 2096704 = 25905^2 + 1448^2 .

It is a cyclic number.

It is not a de Polignac number, because 673165729 - 2³ = 673165721 is a prime.

It is not a weakly prime, because it can be changed into another prime (673165721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336582864 + 336582865.

It is an arithmetic number, because the mean of its divisors is an integer number (336582865).

Almost surely, 2^673165729 is an apocalyptic number.

It is an amenable number.

673165729 is a deficient number, since it is larger than the sum of its proper divisors (1).

673165729 is an equidigital number, since it uses as much as digits as its factorization.

673165729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 46.

The square root of 673165729 is about 25945.4375372627. The cubic root of 673165729 is about 876.4100167880.

The spelling of 673165729 in words is "six hundred seventy-three million, one hundred sixty-five thousand, seven hundred twenty-nine".