71310289 has 2 divisors, whose sum is σ = 71310290. Its totient is φ = 71310288.

The previous prime is 71310277. The next prime is 71310301. The reversal of 71310289 is 98201317.

It is a balanced prime because it is at equal distance from previous prime (71310277) and next prime (71310301).

It can be written as a sum of positive squares in only one way, i.e., 60715264 + 10595025 = 7792^2 + 3255^2 .

It is an emirp because it is prime and its reverse (98201317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71310289 - 2²³ = 62921681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71310289.

It is not a weakly prime, because it can be changed into another prime (71310209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35655144 + 35655145.

It is an arithmetic number, because the mean of its divisors is an integer number (35655145).

Almost surely, 2^71310289 is an apocalyptic number.

It is an amenable number.

71310289 is a deficient number, since it is larger than the sum of its proper divisors (1).

71310289 is an equidigital number, since it uses as much as digits as its factorization.

71310289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 71310289 is about 8444.5419650802. The cubic root of 71310289 is about 414.6841143868.

The spelling of 71310289 in words is "seventy-one million, three hundred ten thousand, two hundred eighty-nine".