78897593 has 2 divisors, whose sum is σ = 78897594. Its totient is φ = 78897592.

The previous prime is 78897589. The next prime is 78897601. The reversal of 78897593 is 39579887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67043344 + 11854249 = 8188^2 + 3443^2 .

It is a cyclic number.

It is not a de Polignac number, because 78897593 - 2² = 78897589 is a prime.

It is not a weakly prime, because it can be changed into another prime (78897503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39448796 + 39448797.

It is an arithmetic number, because the mean of its divisors is an integer number (39448797).

Almost surely, 2^78897593 is an apocalyptic number.

It is an amenable number.

78897593 is a deficient number, since it is larger than the sum of its proper divisors (1).

78897593 is an equidigital number, since it uses as much as digits as its factorization.

78897593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 56.

The square root of 78897593 is about 8882.4317053384. The cubic root of 78897593 is about 428.8985565840.

The spelling of 78897593 in words is "seventy-eight million, eight hundred ninety-seven thousand, five hundred ninety-three".