1389373913 has 2 divisors, whose sum is σ = 1389373914. Its totient is φ = 1389373912.

The previous prime is 1389373907. The next prime is 1389373933. The reversal of 1389373913 is 3193739831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210135369 + 179238544 = 34787^2 + 13388^2 .

It is an emirp because it is prime and its reverse (3193739831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1389373913 - 2⁴ = 1389373897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1389373933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694686956 + 694686957.

It is an arithmetic number, because the mean of its divisors is an integer number (694686957).

Almost surely, 2^1389373913 is an apocalyptic number.

It is an amenable number.

1389373913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389373913 is an equidigital number, since it uses as much as digits as its factorization.

1389373913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 47.

The square root of 1389373913 is about 37274.3063382808. The cubic root of 1389373913 is about 1115.8514448035.

The spelling of 1389373913 in words is "one billion, three hundred eighty-nine million, three hundred seventy-three thousand, nine hundred thirteen".