79643794 has 4 divisors (see below), whose sum is σ = 119465694. Its totient is φ = 39821896.

The previous prime is 79643777. The next prime is 79643797. The reversal of 79643794 is 49734697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49734697 = 37 ⋅1344181.

It can be written as a sum of positive squares in only one way, i.e., 78943225 + 700569 = 8885^2 + 837^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (79643797) 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, 19910947 + ... + 19910950.

Almost surely, 2^79643794 is an apocalyptic number.

79643794 is a deficient number, since it is larger than the sum of its proper divisors (39821900).

79643794 is a wasteful number, since it uses less digits than its factorization.

79643794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39821899.

The product of its digits is 1143072, while the sum is 49.

The square root of 79643794 is about 8924.3371742668. The cubic root of 79643794 is about 430.2464676803.

The spelling of 79643794 in words is "seventy-nine million, six hundred forty-three thousand, seven hundred ninety-four".