78659983 has 4 divisors (see below), whose sum is σ = 79161160. Its totient is φ = 78158808.

The previous prime is 78659963. The next prime is 78660011. The reversal of 78659983 is 38995687.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78659983 - 2¹³ = 78651791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78659963) 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, 250353 + ... + 250666.

It is an arithmetic number, because the mean of its divisors is an integer number (19790290).

Almost surely, 2^78659983 is an apocalyptic number.

78659983 is a deficient number, since it is larger than the sum of its proper divisors (501177).

78659983 is a wasteful number, since it uses less digits than its factorization.

78659983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501176.

The product of its digits is 3265920, while the sum is 55.

The square root of 78659983 is about 8869.0463410673. The cubic root of 78659983 is about 428.4675630257.

The spelling of 78659983 in words is "seventy-eight million, six hundred fifty-nine thousand, nine hundred eighty-three".