71173049 has 2 divisors, whose sum is σ = 71173050. Its totient is φ = 71173048.

The previous prime is 71173019. The next prime is 71173051. The reversal of 71173049 is 94037117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55428025 + 15745024 = 7445^2 + 3968^2 .

It is an emirp because it is prime and its reverse (94037117) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71173049 - 2²⁴ = 54395833 is a prime.

Together with 71173051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71173019) 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, 35586524 + 35586525.

It is an arithmetic number, because the mean of its divisors is an integer number (35586525).

Almost surely, 2^71173049 is an apocalyptic number.

It is an amenable number.

71173049 is a deficient number, since it is larger than the sum of its proper divisors (1).

71173049 is an equidigital number, since it uses as much as digits as its factorization.

71173049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 71173049 is about 8436.4120928271. The cubic root of 71173049 is about 414.4179171933.

The spelling of 71173049 in words is "seventy-one million, one hundred seventy-three thousand, forty-nine".