1389873651 has 8 divisors (see below), whose sum is σ = 1855146384. Its totient is φ = 925591680.

The previous prime is 1389873629. The next prime is 1389873677. The reversal of 1389873651 is 1563789831.

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

It is not a de Polignac number, because 1389873651 - 2¹⁴ = 1389857267 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1389873594 and 1389873603.

It is not an unprimeable number, because it can be changed into a prime (1389877651) 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, 244410 + ... + 250031.

It is an arithmetic number, because the mean of its divisors is an integer number (231893298).

Almost surely, 2^1389873651 is an apocalyptic number.

1389873651 is a deficient number, since it is larger than the sum of its proper divisors (465272733).

1389873651 is an equidigital number, since it uses as much as digits as its factorization.

1389873651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495381.

The product of its digits is 1088640, while the sum is 51.

The square root of 1389873651 is about 37281.0092540425. The cubic root of 1389873651 is about 1115.9852140549.

It can be divided in two parts, 138 and 9873651, that added together give a palindrome (9873789).

The spelling of 1389873651 in words is "one billion, three hundred eighty-nine million, eight hundred seventy-three thousand, six hundred fifty-one".