78942706 has 4 divisors (see below), whose sum is σ = 118414062. Its totient is φ = 39471352.

The previous prime is 78942673. The next prime is 78942707. The reversal of 78942706 is 60724987.

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

It can be written as a sum of positive squares in only one way, i.e., 78057225 + 885481 = 8835^2 + 941^2 .

It is not an unprimeable number, because it can be changed into a prime (78942707) 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 as a sum of consecutive naturals, namely, 19735675 + ... + 19735678.

Almost surely, 2^78942706 is an apocalyptic number.

78942706 is a deficient number, since it is larger than the sum of its proper divisors (39471356).

78942706 is a wasteful number, since it uses less digits than its factorization.

78942706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39471355.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 78942706 is about 8884.9707934241. The cubic root of 78942706 is about 428.9802879067.

The spelling of 78942706 in words is "seventy-eight million, nine hundred forty-two thousand, seven hundred six".