1383978939 has 8 divisors (see below), whose sum is σ = 2108920320. Its totient is φ = 790845096.

The previous prime is 1383978887. The next prime is 1383978941. The reversal of 1383978939 is 9398793831.

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

It is not a de Polignac number, because 1383978939 - 2¹² = 1383974843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1383978979) 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, 32951859 + ... + 32951900.

It is an arithmetic number, because the mean of its divisors is an integer number (263615040).

Almost surely, 2^1383978939 is an apocalyptic number.

1383978939 is a deficient number, since it is larger than the sum of its proper divisors (724941381).

1383978939 is an equidigital number, since it uses as much as digits as its factorization.

1383978939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65903769.

The product of its digits is 8817984, while the sum is 60.

The square root of 1383978939 is about 37201.8674128060. The cubic root of 1383978939 is about 1114.4052782358.

The spelling of 1383978939 in words is "one billion, three hundred eighty-three million, nine hundred seventy-eight thousand, nine hundred thirty-nine".