78955291 has 4 divisors (see below), whose sum is σ = 79006752. Its totient is φ = 78903832.

The previous prime is 78955243. The next prime is 78955369. The reversal of 78955291 is 19255987.

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 78955291 - 2¹¹ = 78953243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78955231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23356 + ... + 26521.

It is an arithmetic number, because the mean of its divisors is an integer number (19751688).

Almost surely, 2^78955291 is an apocalyptic number.

78955291 is a deficient number, since it is larger than the sum of its proper divisors (51461).

78955291 is a wasteful number, since it uses less digits than its factorization.

78955291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51460.

The product of its digits is 226800, while the sum is 46.

The square root of 78955291 is about 8885.6789836230. The cubic root of 78955291 is about 429.0030826243.

The spelling of 78955291 in words is "seventy-eight million, nine hundred fifty-five thousand, two hundred ninety-one".