78000517 has 16 divisors (see below), whose sum is σ = 93744000. Its totient is φ = 63483840.

The previous prime is 78000499. The next prime is 78000541. The reversal of 78000517 is 71500087.

It is a happy number.

It is not a de Polignac number, because 78000517 - 2¹¹ = 77998469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78000547) 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 15 ways as a sum of consecutive naturals, for example, 9234 + ... + 15532.

It is an arithmetic number, because the mean of its divisors is an integer number (5859000).

Almost surely, 2^78000517 is an apocalyptic number.

It is an amenable number.

78000517 is a deficient number, since it is larger than the sum of its proper divisors (15743483).

78000517 is a wasteful number, since it uses less digits than its factorization.

78000517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6396.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 78000517 is about 8831.7901356407. The cubic root of 78000517 is about 427.2668121696.

The spelling of 78000517 in words is "seventy-eight million, five hundred seventeen", and thus it is an aban number.