71673913 has 2 divisors, whose sum is σ = 71673914. Its totient is φ = 71673912.

The previous prime is 71673907. The next prime is 71673997. The reversal of 71673913 is 31937617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60093504 + 11580409 = 7752^2 + 3403^2 .

It is a cyclic number.

It is not a de Polignac number, because 71673913 - 2⁹ = 71673401 is a prime.

It is not a weakly prime, because it can be changed into another prime (71623913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35836956 + 35836957.

It is an arithmetic number, because the mean of its divisors is an integer number (35836957).

Almost surely, 2^71673913 is an apocalyptic number.

It is an amenable number.

71673913 is a deficient number, since it is larger than the sum of its proper divisors (1).

71673913 is an equidigital number, since it uses as much as digits as its factorization.

71673913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814, while the sum is 37.

The square root of 71673913 is about 8466.0447081267. The cubic root of 71673913 is about 415.3877693660.

The spelling of 71673913 in words is "seventy-one million, six hundred seventy-three thousand, nine hundred thirteen".