1389658169 has 2 divisors, whose sum is σ = 1389658170. Its totient is φ = 1389658168.

The previous prime is 1389658147. The next prime is 1389658177. The reversal of 1389658169 is 9618569831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1383468025 + 6190144 = 37195^2 + 2488^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389658169 - 2¹² = 1389654073 is a prime.

It is a super-2 number, since 2×1389658169² = 3862299653336865122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1389658769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694829084 + 694829085.

It is an arithmetic number, because the mean of its divisors is an integer number (694829085).

Almost surely, 2^1389658169 is an apocalyptic number.

It is an amenable number.

1389658169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389658169 is an equidigital number, since it uses as much as digits as its factorization.

1389658169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 56.

The square root of 1389658169 is about 37278.1191719754. The cubic root of 1389658169 is about 1115.9275380318.

The spelling of 1389658169 in words is "one billion, three hundred eighty-nine million, six hundred fifty-eight thousand, one hundred sixty-nine".