1389330669 has 12 divisors (see below), whose sum is σ = 1892702144. Its totient is φ = 906509304.

The previous prime is 1389330667. The next prime is 1389330707. The reversal of 1389330669 is 9660339831.

1389330669 = 8777² + 8778² + ... + 8794².

It is a happy number.

It is not a de Polignac number, because 1389330669 - 2¹ = 1389330667 is a prime.

It is a super-2 number, since 2×1389330669² = 3860479415647975122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389330667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98197 + ... + 111450.

Almost surely, 2^1389330669 is an apocalyptic number.

It is an amenable number.

1389330669 is a deficient number, since it is larger than the sum of its proper divisors (503371475).

1389330669 is an equidigital number, since it uses as much as digits as its factorization.

1389330669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209744 (or 209697 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 48.

The square root of 1389330669 is about 37273.7262559031. The cubic root of 1389330669 is about 1115.8398677950.

The spelling of 1389330669 in words is "one billion, three hundred eighty-nine million, three hundred thirty thousand, six hundred sixty-nine".