71202289 has 2 divisors, whose sum is σ = 71202290. Its totient is φ = 71202288.

The previous prime is 71202277. The next prime is 71202331. The reversal of 71202289 is 98220217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64400625 + 6801664 = 8025^2 + 2608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71202289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71202289.

It is not a weakly prime, because it can be changed into another prime (71202589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35601144 + 35601145.

It is an arithmetic number, because the mean of its divisors is an integer number (35601145).

Almost surely, 2^71202289 is an apocalyptic number.

It is an amenable number.

71202289 is a deficient number, since it is larger than the sum of its proper divisors (1).

71202289 is an equidigital number, since it uses as much as digits as its factorization.

71202289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 71202289 is about 8438.1448790596. The cubic root of 71202289 is about 414.4746611482.

It can be divided in two parts, 7120 and 2289, that added together give a square (9409 = 97²).

The spelling of 71202289 in words is "seventy-one million, two hundred two thousand, two hundred eighty-nine".