78652619 has 4 divisors (see below), whose sum is σ = 78689496. Its totient is φ = 78615744.

The previous prime is 78652603. The next prime is 78652631. The reversal of 78652619 is 91625687.

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 78652619 - 2⁴ = 78652603 is a prime.

It is a super-4 number, since 4×78652619⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78652619.

It is not an unprimeable number, because it can be changed into a prime (78652649) 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, 15029 + ... + 19574.

It is an arithmetic number, because the mean of its divisors is an integer number (19672374).

Almost surely, 2^78652619 is an apocalyptic number.

78652619 is a deficient number, since it is larger than the sum of its proper divisors (36877).

78652619 is a wasteful number, since it uses less digits than its factorization.

78652619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36876.

The product of its digits is 181440, while the sum is 44.

The square root of 78652619 is about 8868.6311796128. The cubic root of 78652619 is about 428.4541918320.

The spelling of 78652619 in words is "seventy-eight million, six hundred fifty-two thousand, six hundred nineteen".