71908489 has 2 divisors, whose sum is σ = 71908490. Its totient is φ = 71908488.

The previous prime is 71908481. The next prime is 71908541. The reversal of 71908489 is 98480917.

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., 39589264 + 32319225 = 6292^2 + 5685^2 .

It is a cyclic number.

It is not a de Polignac number, because 71908489 - 2³ = 71908481 is a prime.

It is not a weakly prime, because it can be changed into another prime (71908481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35954244 + 35954245.

It is an arithmetic number, because the mean of its divisors is an integer number (35954245).

Almost surely, 2^71908489 is an apocalyptic number.

It is an amenable number.

71908489 is a deficient number, since it is larger than the sum of its proper divisors (1).

71908489 is an equidigital number, since it uses as much as digits as its factorization.

71908489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 71908489 is about 8479.8873223646. The cubic root of 71908489 is about 415.8404393770.

The spelling of 71908489 in words is "seventy-one million, nine hundred eight thousand, four hundred eighty-nine".