1389355049 has 2 divisors, whose sum is σ = 1389355050. Its totient is φ = 1389355048.

The previous prime is 1389355027. The next prime is 1389355061. The reversal of 1389355049 is 9405539831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700555024 + 688800025 = 26468^2 + 26245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1389355049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1389354994 and 1389355012.

It is not a weakly prime, because it can be changed into another prime (1380355049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694677524 + 694677525.

It is an arithmetic number, because the mean of its divisors is an integer number (694677525).

Almost surely, 2^1389355049 is an apocalyptic number.

It is an amenable number.

1389355049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389355049 is an equidigital number, since it uses as much as digits as its factorization.

1389355049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 1389355049 is about 37274.0532944836. The cubic root of 1389355049 is about 1115.8463946830.

The spelling of 1389355049 in words is "one billion, three hundred eighty-nine million, three hundred fifty-five thousand, forty-nine".