71044489 has 2 divisors, whose sum is σ = 71044490. Its totient is φ = 71044488.

The previous prime is 71044483. The next prime is 71044499. The reversal of 71044489 is 98444017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50296464 + 20748025 = 7092^2 + 4555^2 .

It is a cyclic number.

It is not a de Polignac number, because 71044489 - 2³ = 71044481 is a prime.

It is a super-2 number, since 2×71044489² = 10094638834542242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71044481) 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, 35522244 + 35522245.

It is an arithmetic number, because the mean of its divisors is an integer number (35522245).

Almost surely, 2^71044489 is an apocalyptic number.

It is an amenable number.

71044489 is a deficient number, since it is larger than the sum of its proper divisors (1).

71044489 is an equidigital number, since it uses as much as digits as its factorization.

71044489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 71044489 is about 8428.7892962157. The cubic root of 71044489 is about 414.1682455415.

The spelling of 71044489 in words is "seventy-one million, forty-four thousand, four hundred eighty-nine".