1383968818 has 4 divisors (see below), whose sum is σ = 2075953230. Its totient is φ = 691984408.

The previous prime is 1383968801. The next prime is 1383968819. The reversal of 1383968818 is 8188693831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 846053569 + 537915249 = 29087^2 + 23193^2 .

It is not an unprimeable number, because it can be changed into a prime (1383968819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345992203 + ... + 345992206.

Almost surely, 2^1383968818 is an apocalyptic number.

1383968818 is a deficient number, since it is larger than the sum of its proper divisors (691984412).

1383968818 is an equidigital number, since it uses as much as digits as its factorization.

1383968818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691984411.

The product of its digits is 1990656, while the sum is 55.

The square root of 1383968818 is about 37201.7313844396. The cubic root of 1383968818 is about 1114.4025616907.

The spelling of 1383968818 in words is "one billion, three hundred eighty-three million, nine hundred sixty-eight thousand, eight hundred eighteen".