1381979349 has 12 divisors (see below), whose sum is σ = 2060586112. Its totient is φ = 891599400.

The previous prime is 1381979327. The next prime is 1381979371. The reversal of 1381979349 is 9439791831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1381979327) and next prime (1381979371).

It is not a de Polignac number, because 1381979349 - 2¹² = 1381975253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1381979295 and 1381979304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381979549) 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, 2476387 + ... + 2476944.

Almost surely, 2^1381979349 is an apocalyptic number.

It is an amenable number.

1381979349 is a deficient number, since it is larger than the sum of its proper divisors (678606763).

1381979349 is a wasteful number, since it uses less digits than its factorization.

1381979349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953368 (or 4953365 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 1381979349 is about 37174.9828379248. The cubic root of 1381979349 is about 1113.8683173437.

The spelling of 1381979349 in words is "one billion, three hundred eighty-one million, nine hundred seventy-nine thousand, three hundred forty-nine".