1379978 has 8 divisors (see below), whose sum is σ = 2120580. Its totient is φ = 673120.

The previous prime is 1379969. The next prime is 1379981. The reversal of 1379978 is 8799731.

It can be written as a sum of positive squares in 2 ways, for example, as 935089 + 444889 = 967^2 + 667^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8333 + ... + 8496.

2^1379978 is an apocalyptic number.

1379978 is a deficient number, since it is larger than the sum of its proper divisors (740602).

1379978 is a wasteful number, since it uses less digits than its factorization.

1379978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16872.

The product of its digits is 95256, while the sum is 44.

The square root of 1379978 is about 1174.7246485879. The cubic root of 1379978 is about 111.3330365210. Note that the first 3 decimals are identical.

The spelling of 1379978 in words is "one million, three hundred seventy-nine thousand, nine hundred seventy-eight".