71011489 has 2 divisors, whose sum is σ = 71011490. Its totient is φ = 71011488.

The previous prime is 71011481. The next prime is 71011529. The reversal of 71011489 is 98411017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57380625 + 13630864 = 7575^2 + 3692^2 .

It is an emirp because it is prime and its reverse (98411017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71011489 - 2³ = 71011481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71011489.

It is not a weakly prime, because it can be changed into another prime (71011481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35505744 + 35505745.

It is an arithmetic number, because the mean of its divisors is an integer number (35505745).

Almost surely, 2^71011489 is an apocalyptic number.

It is an amenable number.

71011489 is a deficient number, since it is larger than the sum of its proper divisors (1).

71011489 is an equidigital number, since it uses as much as digits as its factorization.

71011489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 71011489 is about 8426.8314923226. The cubic root of 71011489 is about 414.1041088809.

The spelling of 71011489 in words is "seventy-one million, eleven thousand, four hundred eighty-nine".