1386240847 has 4 divisors (see below), whose sum is σ = 1399699600. Its totient is φ = 1372782096.

The previous prime is 1386240839. The next prime is 1386240859. The reversal of 1386240847 is 7480426831.

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

It is a cyclic number.

It is not a de Polignac number, because 1386240847 - 2³ = 1386240839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386240827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6729222 + ... + 6729427.

It is an arithmetic number, because the mean of its divisors is an integer number (349924900).

Almost surely, 2^1386240847 is an apocalyptic number.

1386240847 is a deficient number, since it is larger than the sum of its proper divisors (13458753).

1386240847 is a wasteful number, since it uses less digits than its factorization.

1386240847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13458752.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 1386240847 is about 37232.2554648520. The cubic root of 1386240847 is about 1115.0120577567.

The spelling of 1386240847 in words is "one billion, three hundred eighty-six million, two hundred forty thousand, eight hundred forty-seven".