78851983 has 8 divisors (see below), whose sum is σ = 90267552. Its totient is φ = 67474176.

The previous prime is 78851977. The next prime is 78851987. The reversal of 78851983 is 38915887.

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

It is not a de Polignac number, because 78851983 - 2⁵ = 78851951 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 (78851987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4810 + ... + 13447.

It is an arithmetic number, because the mean of its divisors is an integer number (11283444).

Almost surely, 2^78851983 is an apocalyptic number.

78851983 is a deficient number, since it is larger than the sum of its proper divisors (11415569).

78851983 is a wasteful number, since it uses less digits than its factorization.

78851983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18881.

The product of its digits is 483840, while the sum is 49.

The square root of 78851983 is about 8879.8639066148. The cubic root of 78851983 is about 428.8158931668.

The spelling of 78851983 in words is "seventy-eight million, eight hundred fifty-one thousand, nine hundred eighty-three".