78888871 has 2 divisors, whose sum is σ = 78888872. Its totient is φ = 78888870.

The previous prime is 78888863. The next prime is 78888911. The reversal of 78888871 is 17888887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78888871 - 2³ = 78888863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78880871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39444435 + 39444436.

It is an arithmetic number, because the mean of its divisors is an integer number (39444436).

Almost surely, 2^78888871 is an apocalyptic number.

78888871 is a deficient number, since it is larger than the sum of its proper divisors (1).

78888871 is an equidigital number, since it uses as much as digits as its factorization.

78888871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1605632, while the sum is 55.

The square root of 78888871 is about 8881.9407226124. The cubic root of 78888871 is about 428.8827513233.

The spelling of 78888871 in words is "seventy-eight million, eight hundred eighty-eight thousand, eight hundred seventy-one".