1378318979 has 8 divisors (see below), whose sum is σ = 1460257920. Its totient is φ = 1296475776.

The previous prime is 1378318951. The next prime is 1378319003. The reversal of 1378318979 is 9798138731.

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 1378318979 - 2²⁰ = 1377270403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378318939) 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, 6857 + ... + 52949.

It is an arithmetic number, because the mean of its divisors is an integer number (182532240).

Almost surely, 2^1378318979 is an apocalyptic number.

1378318979 is a deficient number, since it is larger than the sum of its proper divisors (81938941).

1378318979 is a wasteful number, since it uses less digits than its factorization.

1378318979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47869.

The product of its digits is 2286144, while the sum is 56.

The square root of 1378318979 is about 37125.7185654365. The cubic root of 1378318979 is about 1112.8840346341.

The spelling of 1378318979 in words is "one billion, three hundred seventy-eight million, three hundred eighteen thousand, nine hundred seventy-nine".