1389520743 has 8 divisors (see below), whose sum is σ = 1995209328. Its totient is φ = 855089664.

The previous prime is 1389520729. The next prime is 1389520751. The reversal of 1389520743 is 3470259831.

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

It is not a de Polignac number, because 1389520743 - 2⁸ = 1389520487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1389520695 and 1389520704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389520723) 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 7 ways as a sum of consecutive naturals, for example, 17814330 + ... + 17814407.

It is an arithmetic number, because the mean of its divisors is an integer number (249401166).

Almost surely, 2^1389520743 is an apocalyptic number.

1389520743 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1389520743 is a deficient number, since it is larger than the sum of its proper divisors (605688585).

1389520743 is a wasteful number, since it uses less digits than its factorization.

1389520743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35628753.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 1389520743 is about 37276.2758735365. The cubic root of 1389520743 is about 1115.8907514041.

The spelling of 1389520743 in words is "one billion, three hundred eighty-nine million, five hundred twenty thousand, seven hundred forty-three".