1389166749 has 12 divisors (see below), whose sum is σ = 2007244512. Its totient is φ = 925801800.

The previous prime is 1389166717. The next prime is 1389166763. The reversal of 1389166749 is 9476619831.

It is not a de Polignac number, because 1389166749 - 2⁵ = 1389166717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1389166695 and 1389166704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389166249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4534 + ... + 52904.

It is an arithmetic number, because the mean of its divisors is an integer number (167270376).

Almost surely, 2^1389166749 is an apocalyptic number.

It is an amenable number.

1389166749 is a deficient number, since it is larger than the sum of its proper divisors (618077763).

1389166749 is a wasteful number, since it uses less digits than its factorization.

1389166749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51568 (or 51565 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 1389166749 is about 37271.5273231457. The cubic root of 1389166749 is about 1115.7959819947.

The spelling of 1389166749 in words is "one billion, three hundred eighty-nine million, one hundred sixty-six thousand, seven hundred forty-nine".