78000499 has 2 divisors, whose sum is σ = 78000500. Its totient is φ = 78000498.

The previous prime is 78000497. The next prime is 78000541. The reversal of 78000499 is 99400087.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (99400087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78000499 - 2¹ = 78000497 is a prime.

Together with 78000497, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78000497) 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 as a sum of consecutive naturals, namely, 39000249 + 39000250.

It is an arithmetic number, because the mean of its divisors is an integer number (39000250).

Almost surely, 2^78000499 is an apocalyptic number.

78000499 is a deficient number, since it is larger than the sum of its proper divisors (1).

78000499 is an equidigital number, since it uses as much as digits as its factorization.

78000499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 78000499 is about 8831.7891165947. The cubic root of 78000499 is about 427.2667793032.

The spelling of 78000499 in words is "seventy-eight million, four hundred ninety-nine", and thus it is an aban number.