78882589 has 2 divisors, whose sum is σ = 78882590. Its totient is φ = 78882588.

The previous prime is 78882563. The next prime is 78882599. The reversal of 78882589 is 98528887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78765625 + 116964 = 8875^2 + 342^2 .

It is a cyclic number.

It is not a de Polignac number, because 78882589 - 2⁹ = 78882077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78882599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39441294 + 39441295.

It is an arithmetic number, because the mean of its divisors is an integer number (39441295).

Almost surely, 2^78882589 is an apocalyptic number.

It is an amenable number.

78882589 is a deficient number, since it is larger than the sum of its proper divisors (1).

78882589 is an equidigital number, since it uses as much as digits as its factorization.

78882589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2580480, while the sum is 55.

The square root of 78882589 is about 8881.5870766435. The cubic root of 78882589 is about 428.8713668998.

The spelling of 78882589 in words is "seventy-eight million, eight hundred eighty-two thousand, five hundred eighty-nine".