78619647 has 8 divisors (see below), whose sum is σ = 104875056. Its totient is φ = 52388672.

The previous prime is 78619643. The next prime is 78619669. The reversal of 78619647 is 74691687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78619647 - 2² = 78619643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78619596 and 78619605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78619643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3613 + ... + 13049.

It is an arithmetic number, because the mean of its divisors is an integer number (13109382).

Almost surely, 2^78619647 is an apocalyptic number.

78619647 is a deficient number, since it is larger than the sum of its proper divisors (26255409).

78619647 is a wasteful number, since it uses less digits than its factorization.

78619647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12217.

The product of its digits is 508032, while the sum is 48.

The square root of 78619647 is about 8866.7720733083. The cubic root of 78619647 is about 428.3943126387.

The spelling of 78619647 in words is "seventy-eight million, six hundred nineteen thousand, six hundred forty-seven".