1386906898609 has 4 divisors (see below), whose sum is σ = 1399630815220. Its totient is φ = 1374182982000.

The previous prime is 1386906898579. The next prime is 1386906898669. The reversal of 1386906898609 is 9068986096831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 614582306209 + 772324592400 = 783953^2 + 878820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1386906898609 is a prime.

It is a super-2 number, since 2×1386906898609² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1386906898669) 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 3 ways as a sum of consecutive naturals, for example, 6361958142 + ... + 6361958359.

It is an arithmetic number, because the mean of its divisors is an integer number (349907703805).

Almost surely, 2^{1386906898609} is an apocalyptic number.

It is an amenable number.

1386906898609 is a deficient number, since it is larger than the sum of its proper divisors (12723916611).

1386906898609 is a wasteful number, since it uses less digits than its factorization.

1386906898609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12723916610.

The product of its (nonzero) digits is 241864704, while the sum is 73.

The spelling of 1386906898609 in words is "one trillion, three hundred eighty-six billion, nine hundred six million, eight hundred ninety-eight thousand, six hundred nine".