1378979205 has 8 divisors (see below), whose sum is σ = 2206366752. Its totient is φ = 735455568.

The previous prime is 1378979183. The next prime is 1378979227. The reversal of 1378979205 is 5029798731.

It is an interprime number because it is at equal distance from previous prime (1378979183) and next prime (1378979227).

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

It is not a de Polignac number, because 1378979205 - 2¹² = 1378975109 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 45965959 + ... + 45965988.

It is an arithmetic number, because the mean of its divisors is an integer number (275795844).

Almost surely, 2^1378979205 is an apocalyptic number.

1378979205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378979205 is a deficient number, since it is larger than the sum of its proper divisors (827387547).

1378979205 is an equidigital number, since it uses as much as digits as its factorization.

1378979205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91931955.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 1378979205 is about 37134.6092614424. The cubic root of 1378979205 is about 1113.0616997704.

The spelling of 1378979205 in words is "one billion, three hundred seventy-eight million, nine hundred seventy-nine thousand, two hundred five".