78966983 has 4 divisors (see below), whose sum is σ = 83123160. Its totient is φ = 74810808.

The previous prime is 78966967. The next prime is 78967019. The reversal of 78966983 is 38966987.

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 78966983 - 2⁴ = 78966967 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 (78960983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2078060 + ... + 2078097.

It is an arithmetic number, because the mean of its divisors is an integer number (20780790).

Almost surely, 2^78966983 is an apocalyptic number.

78966983 is a deficient number, since it is larger than the sum of its proper divisors (4156177).

78966983 is a wasteful number, since it uses less digits than its factorization.

78966983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156176.

The product of its digits is 3919104, while the sum is 56.

The square root of 78966983 is about 8886.3368718500. The cubic root of 78966983 is about 429.0242577155.

The spelling of 78966983 in words is "seventy-eight million, nine hundred sixty-six thousand, nine hundred eighty-three".