78885071 has 2 divisors, whose sum is σ = 78885072. Its totient is φ = 78885070.

The previous prime is 78885043. The next prime is 78885097. The reversal of 78885071 is 17058887.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78885071 - 2⁶ = 78885007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78885671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39442535 + 39442536.

It is an arithmetic number, because the mean of its divisors is an integer number (39442536).

Almost surely, 2^78885071 is an apocalyptic number.

78885071 is a deficient number, since it is larger than the sum of its proper divisors (1).

78885071 is an equidigital number, since it uses as much as digits as its factorization.

78885071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125440, while the sum is 44.

The square root of 78885071 is about 8881.7268028239. The cubic root of 78885071 is about 428.8758649248.

The spelling of 78885071 in words is "seventy-eight million, eight hundred eighty-five thousand, seventy-one".