71673082381 has 2 divisors, whose sum is σ = 71673082382. Its totient is φ = 71673082380.

The previous prime is 71673082331. The next prime is 71673082391. The reversal of 71673082381 is 18328037617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48854260900 + 22818821481 = 221030^2 + 151059^2 .

It is a cyclic number.

It is not a de Polignac number, because 71673082381 - 2¹³ = 71673074189 is a prime.

It is a super-2 number, since 2×71673082381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71673082301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35836541190 + 35836541191.

It is an arithmetic number, because the mean of its divisors is an integer number (35836541191).

Almost surely, 2^71673082381 is an apocalyptic number.

It is an amenable number.

71673082381 is a deficient number, since it is larger than the sum of its proper divisors (1).

71673082381 is an equidigital number, since it uses as much as digits as its factorization.

71673082381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 71673082381 in words is "seventy-one billion, six hundred seventy-three million, eighty-two thousand, three hundred eighty-one".