78983447 has 4 divisors (see below), whose sum is σ = 79114176. Its totient is φ = 78852720.

The previous prime is 78983423. The next prime is 78983473. The reversal of 78983447 is 74438987.

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 78983447 - 2⁶ = 78983383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78983395 and 78983404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78986447) 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, 64454 + ... + 65667.

It is an arithmetic number, because the mean of its divisors is an integer number (19778544).

Almost surely, 2^78983447 is an apocalyptic number.

78983447 is a deficient number, since it is larger than the sum of its proper divisors (130729).

78983447 is a wasteful number, since it uses less digits than its factorization.

78983447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130728.

The product of its digits is 1354752, while the sum is 50.

The square root of 78983447 is about 8887.2631895314. The cubic root of 78983447 is about 429.0540717140.

The spelling of 78983447 in words is "seventy-eight million, nine hundred eighty-three thousand, four hundred forty-seven".