673712161 has 2 divisors, whose sum is σ = 673712162. Its totient is φ = 673712160.

The previous prime is 673712141. The next prime is 673712177. The reversal of 673712161 is 161217376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 509359761 + 164352400 = 22569^2 + 12820^2 .

It is a cyclic number.

It is not a de Polignac number, because 673712161 - 2⁵ = 673712129 is a prime.

It is not a weakly prime, because it can be changed into another prime (673712101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336856080 + 336856081.

It is an arithmetic number, because the mean of its divisors is an integer number (336856081).

Almost surely, 2^673712161 is an apocalyptic number.

It is an amenable number.

673712161 is a deficient number, since it is larger than the sum of its proper divisors (1).

673712161 is an equidigital number, since it uses as much as digits as its factorization.

673712161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 34.

The square root of 673712161 is about 25955.9658074979. The cubic root of 673712161 is about 876.6470901349.

The spelling of 673712161 in words is "six hundred seventy-three million, seven hundred twelve thousand, one hundred sixty-one".