1378479697 has 64 divisors (see below), whose sum is σ = 1844674560. Its totient is φ = 1001548800.

The previous prime is 1378479691. The next prime is 1378479721. The reversal of 1378479697 is 7969748731.

It is not a de Polignac number, because 1378479697 - 2¹⁹ = 1377955409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378479691) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4976323 + ... + 4976599.

It is an arithmetic number, because the mean of its divisors is an integer number (28823040).

Almost surely, 2^1378479697 is an apocalyptic number.

1378479697 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1378479697 is a deficient number, since it is larger than the sum of its proper divisors (466194863).

1378479697 is a wasteful number, since it uses less digits than its factorization.

1378479697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422.

The product of its digits is 16003008, while the sum is 61.

The square root of 1378479697 is about 37127.8830126362. The cubic root of 1378479697 is about 1112.9272886625.

The spelling of 1378479697 in words is "one billion, three hundred seventy-eight million, four hundred seventy-nine thousand, six hundred ninety-seven".