71224589 has 2 divisors, whose sum is σ = 71224590. Its totient is φ = 71224588.

The previous prime is 71224561. The next prime is 71224631. The reversal of 71224589 is 98542217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68475625 + 2748964 = 8275^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 71224589 - 2²⁴ = 54447373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71224529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35612294 + 35612295.

It is an arithmetic number, because the mean of its divisors is an integer number (35612295).

Almost surely, 2^71224589 is an apocalyptic number.

It is an amenable number.

71224589 is a deficient number, since it is larger than the sum of its proper divisors (1).

71224589 is an equidigital number, since it uses as much as digits as its factorization.

71224589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 71224589 is about 8439.4661561025. The cubic root of 71224589 is about 414.5179267057.

It can be divided in two parts, 7122 and 4589, that added together give a palindrome (11711).

The spelling of 71224589 in words is "seventy-one million, two hundred twenty-four thousand, five hundred eighty-nine".