1387437889867 has 8 divisors (see below), whose sum is σ = 1399928367600. Its totient is φ = 1374983253984.

The previous prime is 1387437889837. The next prime is 1387437889879. The reversal of 1387437889867 is 7689887347831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1387437889867 - 2¹¹ = 1387437887819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387437889837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8882692 + ... + 9037537.

It is an arithmetic number, because the mean of its divisors is an integer number (174991045950).

Almost surely, 2^{1387437889867} is an apocalyptic number.

1387437889867 is a deficient number, since it is larger than the sum of its proper divisors (12490477733).

1387437889867 is a wasteful number, since it uses less digits than its factorization.

1387437889867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17920925.

The product of its digits is 2731180032, while the sum is 79.

The spelling of 1387437889867 in words is "one trillion, three hundred eighty-seven billion, four hundred thirty-seven million, eight hundred eighty-nine thousand, eight hundred sixty-seven".