78784047 has 12 divisors (see below), whose sum is σ = 113958624. Its totient is φ = 52449120.

The previous prime is 78784033. The next prime is 78784061. The reversal of 78784047 is 74048787.

It is an interprime number because it is at equal distance from previous prime (78784033) and next prime (78784061).

It is not a de Polignac number, because 78784047 - 2⁴ = 78784031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78783993 and 78784011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78784007) 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 in 11 ways as a sum of consecutive naturals, for example, 1098 + ... + 12600.

It is an arithmetic number, because the mean of its divisors is an integer number (9496552).

Almost surely, 2^78784047 is an apocalyptic number.

78784047 is a deficient number, since it is larger than the sum of its proper divisors (35174577).

78784047 is a wasteful number, since it uses less digits than its factorization.

78784047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12270 (or 12267 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 78784047 is about 8876.0377984774. The cubic root of 78784047 is about 428.6927070579.

The spelling of 78784047 in words is "seventy-eight million, seven hundred eighty-four thousand, forty-seven".