1381479393 has 12 divisors (see below), whose sum is σ = 2142702960. Its totient is φ = 789416712.

The previous prime is 1381479391. The next prime is 1381479403. The reversal of 1381479393 is 3939741831.

It is a happy number.

It is not a de Polignac number, because 1381479393 - 2¹ = 1381479391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1381479391) 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 11 ways as a sum of consecutive naturals, for example, 4698763 + ... + 4699056.

It is an arithmetic number, because the mean of its divisors is an integer number (178558580).

Almost surely, 2^1381479393 is an apocalyptic number.

It is an amenable number.

1381479393 is a deficient number, since it is larger than the sum of its proper divisors (761223567).

1381479393 is an equidigital number, since it uses as much as digits as its factorization.

1381479393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9397836 (or 9397829 counting only the distinct ones).

The product of its digits is 489888, while the sum is 48.

The square root of 1381479393 is about 37168.2578687783. The cubic root of 1381479393 is about 1113.7339804795.

The spelling of 1381479393 in words is "one billion, three hundred eighty-one million, four hundred seventy-nine thousand, three hundred ninety-three".