79784986 has 8 divisors (see below), whose sum is σ = 119819700. Its totient is φ = 39845088.

The previous prime is 79784977. The next prime is 79784989. The reversal of 79784986 is 68948797.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56927025 + 22857961 = 7545^2 + 4781^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 79784986.

It is not an unprimeable number, because it can be changed into a prime (79784989) 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, 21561 + ... + 24988.

Almost surely, 2^79784986 is an apocalyptic number.

79784986 is a deficient number, since it is larger than the sum of its proper divisors (40034714).

79784986 is a wasteful number, since it uses less digits than its factorization.

79784986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47408.

The product of its digits is 6096384, while the sum is 58.

The square root of 79784986 is about 8932.2441748980. The cubic root of 79784986 is about 430.5005636327.

The spelling of 79784986 in words is "seventy-nine million, seven hundred eighty-four thousand, nine hundred eighty-six".