78927089 has 8 divisors (see below), whose sum is σ = 80332032. Its totient is φ = 77531040.

The previous prime is 78927061. The next prime is 78927103. The reversal of 78927089 is 98072987.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78927089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78927029) 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 7 ways as a sum of consecutive naturals, for example, 17144 + ... + 21254.

It is an arithmetic number, because the mean of its divisors is an integer number (10041504).

Almost surely, 2^78927089 is an apocalyptic number.

It is an amenable number.

78927089 is a deficient number, since it is larger than the sum of its proper divisors (1404943).

78927089 is a wasteful number, since it uses less digits than its factorization.

78927089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4447.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 78927089 is about 8884.0919063233. The cubic root of 78927089 is about 428.9519980776.

The spelling of 78927089 in words is "seventy-eight million, nine hundred twenty-seven thousand, eighty-nine".