1378279847 has 8 divisors (see below), whose sum is σ = 1598687616. Its totient is φ = 1163749752.

The previous prime is 1378279843. The next prime is 1378279849. The reversal of 1378279847 is 7489728731.

It is a happy number.

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 1378279847 - 2² = 1378279843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1378279792 and 1378279801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378279843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1468913 + ... + 1469850.

It is an arithmetic number, because the mean of its divisors is an integer number (199835952).

Almost surely, 2^1378279847 is an apocalyptic number.

1378279847 is a deficient number, since it is larger than the sum of its proper divisors (220407769).

1378279847 is an equidigital number, since it uses as much as digits as its factorization.

1378279847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938837.

The product of its digits is 4741632, while the sum is 56.

The square root of 1378279847 is about 37125.1915415934. The cubic root of 1378279847 is about 1112.8735025316.

The spelling of 1378279847 in words is "one billion, three hundred seventy-eight million, two hundred seventy-nine thousand, eight hundred forty-seven".