7878047 has 2 divisors, whose sum is σ = 7878048. Its totient is φ = 7878046.

The previous prime is 7878043. The next prime is 7878071. The reversal of 7878047 is 7408787.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7878047 - 2² = 7878043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7877995 and 7878013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7878043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3939023 + 3939024.

It is an arithmetic number, because the mean of its divisors is an integer number (3939024).

Almost surely, 2^7878047 is an apocalyptic number.

7878047 is a deficient number, since it is larger than the sum of its proper divisors (1).

7878047 is an equidigital number, since it uses as much as digits as its factorization.

7878047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87808, while the sum is 41.

The square root of 7878047 is about 2806.7858842455. The cubic root of 7878047 is about 198.9785167418.

It can be divided in two parts, 78 and 78047, that added together give a 7-th power (78125 = 5⁷).

The spelling of 7878047 in words is "seven million, eight hundred seventy-eight thousand, forty-seven".