78755071 has 4 divisors (see below), whose sum is σ = 78786432. Its totient is φ = 78723712.

The previous prime is 78755069. The next prime is 78755093. The reversal of 78755071 is 17055787.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78755071 - 2¹ = 78755069 is a prime.

It is a super-2 number, since 2×78755071² = 12404722416430082, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78755051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11551 + ... + 17056.

It is an arithmetic number, because the mean of its divisors is an integer number (19696608).

Almost surely, 2^78755071 is an apocalyptic number.

78755071 is a deficient number, since it is larger than the sum of its proper divisors (31361).

78755071 is a wasteful number, since it uses less digits than its factorization.

78755071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31360.

The product of its (nonzero) digits is 68600, while the sum is 40.

The square root of 78755071 is about 8874.4053885317. The cubic root of 78755071 is about 428.6401442886.

The spelling of 78755071 in words is "seventy-eight million, seven hundred fifty-five thousand, seventy-one".