1386947349 has 6 divisors (see below), whose sum is σ = 2003368406. Its totient is φ = 924631560.

The previous prime is 1386947323. The next prime is 1386947371. The reversal of 1386947349 is 9437496831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1273205124 + 113742225 = 35682^2 + 10665^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1386947349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1386947295 and 1386947304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386947249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77052622 + ... + 77052639.

Almost surely, 2^1386947349 is an apocalyptic number.

It is an amenable number.

1386947349 is a deficient number, since it is larger than the sum of its proper divisors (616421057).

1386947349 is a wasteful number, since it uses less digits than its factorization.

1386947349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154105267 (or 154105264 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 1386947349 is about 37241.7420242394. The cubic root of 1386947349 is about 1115.2014487178.

The spelling of 1386947349 in words is "one billion, three hundred eighty-six million, nine hundred forty-seven thousand, three hundred forty-nine".