78946339 has 4 divisors (see below), whose sum is σ = 79387560. Its totient is φ = 78505120.

The previous prime is 78946333. The next prime is 78946379. The reversal of 78946339 is 93364987.

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 78946339 - 2⁷ = 78946211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78946292 and 78946301.

It is not an unprimeable number, because it can be changed into a prime (78946333) 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, 220342 + ... + 220699.

It is an arithmetic number, because the mean of its divisors is an integer number (19846890).

Almost surely, 2^78946339 is an apocalyptic number.

78946339 is a deficient number, since it is larger than the sum of its proper divisors (441221).

78946339 is a wasteful number, since it uses less digits than its factorization.

78946339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441220.

The product of its digits is 979776, while the sum is 49.

The square root of 78946339 is about 8885.1752374390. The cubic root of 78946339 is about 428.9868684660.

The spelling of 78946339 in words is "seventy-eight million, nine hundred forty-six thousand, three hundred thirty-nine".