1389351617 has 2 divisors, whose sum is σ = 1389351618. Its totient is φ = 1389351616.

The previous prime is 1389351589. The next prime is 1389351637. The reversal of 1389351617 is 7161539831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 948393616 + 440958001 = 30796^2 + 20999^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389351617 - 2¹⁰ = 1389350593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1389351637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694675808 + 694675809.

It is an arithmetic number, because the mean of its divisors is an integer number (694675809).

Almost surely, 2^1389351617 is an apocalyptic number.

It is an amenable number.

1389351617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389351617 is an equidigital number, since it uses as much as digits as its factorization.

1389351617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 1389351617 is about 37274.0072570686. The cubic root of 1389351617 is about 1115.8454758903.

The spelling of 1389351617 in words is "one billion, three hundred eighty-nine million, three hundred fifty-one thousand, six hundred seventeen".