78676793 has 4 divisors (see below), whose sum is σ = 84728868. Its totient is φ = 72624720.

The previous prime is 78676783. The next prime is 78676823. The reversal of 78676793 is 39767687.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22306729 + 56370064 = 4723^2 + 7508^2 .

It is a cyclic number.

It is not a de Polignac number, because 78676793 - 2¹⁸ = 78414649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78676723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3026018 + ... + 3026043.

It is an arithmetic number, because the mean of its divisors is an integer number (21182217).

Almost surely, 2^78676793 is an apocalyptic number.

It is an amenable number.

78676793 is a deficient number, since it is larger than the sum of its proper divisors (6052075).

78676793 is a wasteful number, since it uses less digits than its factorization.

78676793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6052074.

The product of its digits is 2667168, while the sum is 53.

The square root of 78676793 is about 8869.9939684309. The cubic root of 78676793 is about 428.4980826811.

The spelling of 78676793 in words is "seventy-eight million, six hundred seventy-six thousand, seven hundred ninety-three".