1391338683 has 90 divisors (see below), whose sum is σ = 2458751412. Its totient is φ = 757920240.

The previous prime is 1391338681. The next prime is 1391338693. The reversal of 1391338683 is 3868331931.

It is not a de Polignac number, because 1391338683 - 2¹ = 1391338681 is a prime.

Its product of digits (279936) is a multiple of the sum of its prime divisors (108).

It is not an unprimeable number, because it can be changed into a prime (1391338681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 20766216 + ... + 20766282.

Almost surely, 2^1391338683 is an apocalyptic number.

1391338683 is a deficient number, since it is larger than the sum of its proper divisors (1067412729).

1391338683 is an frugal number, since it uses more digits than its factorization.

1391338683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 108 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 1391338683 is about 37300.6525814228. The cubic root of 1391338683 is about 1116.3771873181.

The spelling of 1391338683 in words is "one billion, three hundred ninety-one million, three hundred thirty-eight thousand, six hundred eighty-three".