1389952617 has 4 divisors (see below), whose sum is σ = 1853270160. Its totient is φ = 926635076.

The previous prime is 1389952591. The next prime is 1389952637. The reversal of 1389952617 is 7162599831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1389952617 - 2¹⁸ = 1389690473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1389952617.

It is not an unprimeable number, because it can be changed into a prime (1389952637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231658767 + ... + 231658772.

It is an arithmetic number, because the mean of its divisors is an integer number (463317540).

Almost surely, 2^1389952617 is an apocalyptic number.

It is an amenable number.

1389952617 is a deficient number, since it is larger than the sum of its proper divisors (463317543).

1389952617 is an equidigital number, since it uses as much as digits as its factorization.

1389952617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463317542.

The product of its digits is 816480, while the sum is 51.

The square root of 1389952617 is about 37282.0683036765. The cubic root of 1389952617 is about 1116.0063486426.

The spelling of 1389952617 in words is "one billion, three hundred eighty-nine million, nine hundred fifty-two thousand, six hundred seventeen".