78918383 has 2 divisors, whose sum is σ = 78918384. Its totient is φ = 78918382.

The previous prime is 78918379. The next prime is 78918401. The reversal of 78918383 is 38381987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78918383 - 2² = 78918379 is a prime.

It is a super-2 number, since 2×78918383² = 12456222350669378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78918283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39459191 + 39459192.

It is an arithmetic number, because the mean of its divisors is an integer number (39459192).

Almost surely, 2^78918383 is an apocalyptic number.

78918383 is a deficient number, since it is larger than the sum of its proper divisors (1).

78918383 is an equidigital number, since it uses as much as digits as its factorization.

78918383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 78918383 is about 8883.6019158897. The cubic root of 78918383 is about 428.9362257429.

The spelling of 78918383 in words is "seventy-eight million, nine hundred eighteen thousand, three hundred eighty-three".