71293289 has 2 divisors, whose sum is σ = 71293290. Its totient is φ = 71293288.

The previous prime is 71293283. The next prime is 71293297. The reversal of 71293289 is 98239217.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55950400 + 15342889 = 7480^2 + 3917^2 .

It is a cyclic number.

It is not a de Polignac number, because 71293289 - 2¹⁶ = 71227753 is a prime.

It is not a weakly prime, because it can be changed into another prime (71293283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35646644 + 35646645.

It is an arithmetic number, because the mean of its divisors is an integer number (35646645).

Almost surely, 2^71293289 is an apocalyptic number.

It is an amenable number.

71293289 is a deficient number, since it is larger than the sum of its proper divisors (1).

71293289 is an equidigital number, since it uses as much as digits as its factorization.

71293289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 71293289 is about 8443.5353377599. The cubic root of 71293289 is about 414.6511589264.

The spelling of 71293289 in words is "seventy-one million, two hundred ninety-three thousand, two hundred eighty-nine".