71406589 has 2 divisors, whose sum is σ = 71406590. Its totient is φ = 71406588.

The previous prime is 71406581. The next prime is 71406631. The reversal of 71406589 is 98560417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37417689 + 33988900 = 6117^2 + 5830^2 .

It is a cyclic number.

It is not a de Polignac number, because 71406589 - 2³ = 71406581 is a prime.

It is a super-2 number, since 2×71406589² = 10197801905229842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71406581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35703294 + 35703295.

It is an arithmetic number, because the mean of its divisors is an integer number (35703295).

Almost surely, 2^71406589 is an apocalyptic number.

It is an amenable number.

71406589 is a deficient number, since it is larger than the sum of its proper divisors (1).

71406589 is an equidigital number, since it uses as much as digits as its factorization.

71406589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 71406589 is about 8450.2419491989. The cubic root of 71406589 is about 414.8706985768.

It can be divided in two parts, 7 and 1406589, that added together give a square (1406596 = 1186²).

The spelling of 71406589 in words is "seventy-one million, four hundred six thousand, five hundred eighty-nine".