71379289 has 2 divisors, whose sum is σ = 71379290. Its totient is φ = 71379288.

The previous prime is 71379283. The next prime is 71379331. The reversal of 71379289 is 98297317.

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., 66504025 + 4875264 = 8155^2 + 2208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71379289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71379283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35689644 + 35689645.

It is an arithmetic number, because the mean of its divisors is an integer number (35689645).

Almost surely, 2^71379289 is an apocalyptic number.

It is an amenable number.

71379289 is a deficient number, since it is larger than the sum of its proper divisors (1).

71379289 is an equidigital number, since it uses as much as digits as its factorization.

71379289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 71379289 is about 8448.6264564129. The cubic root of 71379289 is about 414.8178210394.

The spelling of 71379289 in words is "seventy-one million, three hundred seventy-nine thousand, two hundred eighty-nine".