1387163049 has 4 divisors (see below), whose sum is σ = 1849550736. Its totient is φ = 924775364.

The previous prime is 1387162999. The next prime is 1387163053. The reversal of 1387163049 is 9403617831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9403617831 = 3 ⋅3134539277.

It is a cyclic number.

It is not a de Polignac number, because 1387163049 - 2⁸ = 1387162793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1387163049.

It is not an unprimeable number, because it can be changed into a prime (1387163069) 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 3 ways as a sum of consecutive naturals, for example, 231193839 + ... + 231193844.

It is an arithmetic number, because the mean of its divisors is an integer number (462387684).

Almost surely, 2^1387163049 is an apocalyptic number.

It is an amenable number.

1387163049 is a deficient number, since it is larger than the sum of its proper divisors (462387687).

1387163049 is an equidigital number, since it uses as much as digits as its factorization.

1387163049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462387686.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 1387163049 is about 37244.6378556699. The cubic root of 1387163049 is about 1115.2592582863.

The spelling of 1387163049 in words is "one billion, three hundred eighty-seven million, one hundred sixty-three thousand, forty-nine".