71428589 has 2 divisors, whose sum is σ = 71428590. Its totient is φ = 71428588.

The previous prime is 71428583. The next prime is 71428603. The reversal of 71428589 is 98582417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60918025 + 10510564 = 7805^2 + 3242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71428589 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71428583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35714294 + 35714295.

It is an arithmetic number, because the mean of its divisors is an integer number (35714295).

Almost surely, 2^71428589 is an apocalyptic number.

It is an amenable number.

71428589 is a deficient number, since it is larger than the sum of its proper divisors (1).

71428589 is an equidigital number, since it uses as much as digits as its factorization.

71428589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 44.

The square root of 71428589 is about 8451.5435868248. The cubic root of 71428589 is about 414.9133007060.

The spelling of 71428589 in words is "seventy-one million, four hundred twenty-eight thousand, five hundred eighty-nine".