78939283 has 4 divisors (see below), whose sum is σ = 79094880. Its totient is φ = 78783688.

The previous prime is 78939269. The next prime is 78939293. The reversal of 78939283 is 38293987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38293987 = 19 ⋅2015473.

It is a cyclic number.

It is not a de Polignac number, because 78939283 - 2⁵ = 78939251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78939233) 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, 77035 + ... + 78052.

It is an arithmetic number, because the mean of its divisors is an integer number (19773720).

Almost surely, 2^78939283 is an apocalyptic number.

78939283 is a deficient number, since it is larger than the sum of its proper divisors (155597).

78939283 is a wasteful number, since it uses less digits than its factorization.

78939283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155596.

The product of its digits is 653184, while the sum is 49.

The square root of 78939283 is about 8884.7781626780. The cubic root of 78939283 is about 428.9740875418.

The spelling of 78939283 in words is "seventy-eight million, nine hundred thirty-nine thousand, two hundred eighty-three".