78984361 has 4 divisors (see below), whose sum is σ = 79441092. Its totient is φ = 78527632.

The previous prime is 78984337. The next prime is 78984379. The reversal of 78984361 is 16348987.

It is a happy number.

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 30250000 + 48734361 = 5500^2 + 6981^2 .

It is a cyclic number.

It is not a de Polignac number, because 78984361 - 2¹¹ = 78982313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78984331) 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 3 ways as a sum of consecutive naturals, for example, 228106 + ... + 228451.

It is an arithmetic number, because the mean of its divisors is an integer number (19860273).

Almost surely, 2^78984361 is an apocalyptic number.

It is an amenable number.

78984361 is a deficient number, since it is larger than the sum of its proper divisors (456731).

78984361 is a wasteful number, since it uses less digits than its factorization.

78984361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456730.

The product of its digits is 290304, while the sum is 46.

The square root of 78984361 is about 8887.3146112873. The cubic root of 78984361 is about 429.0557267187.

The spelling of 78984361 in words is "seventy-eight million, nine hundred eighty-four thousand, three hundred sixty-one".