1378847 has 2 divisors, whose sum is σ = 1378848. Its totient is φ = 1378846.

The previous prime is 1378843. The next prime is 1378859. The reversal of 1378847 is 7488731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1378847 - 2² = 1378843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1378847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689423 + 689424.

It is an arithmetic number, because the mean of its divisors is an integer number (689424).

2^1378847 is an apocalyptic number.

1378847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378847 is an equidigital number, since it uses as much as digits as its factorization.

1378847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 38.

The square root of 1378847 is about 1174.2431605081. The cubic root of 1378847 is about 111.3026128283.

The spelling of 1378847 in words is "one million, three hundred seventy-eight thousand, eight hundred forty-seven".