71189449 has 2 divisors, whose sum is σ = 71189450. Its totient is φ = 71189448.

The previous prime is 71189431. The next prime is 71189453. The reversal of 71189449 is 94498117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66716224 + 4473225 = 8168^2 + 2115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71189449 is a prime.

It is not a weakly prime, because it can be changed into another prime (71189429) 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, 35594724 + 35594725.

It is an arithmetic number, because the mean of its divisors is an integer number (35594725).

Almost surely, 2^71189449 is an apocalyptic number.

It is an amenable number.

71189449 is a deficient number, since it is larger than the sum of its proper divisors (1).

71189449 is an equidigital number, since it uses as much as digits as its factorization.

71189449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 71189449 is about 8437.3840140176. The cubic root of 71189449 is about 414.4497454016.

The spelling of 71189449 in words is "seventy-one million, one hundred eighty-nine thousand, four hundred forty-nine".