1389757741 has 2 divisors, whose sum is σ = 1389757742. Its totient is φ = 1389757740.

The previous prime is 1389757661. The next prime is 1389757757. The reversal of 1389757741 is 1477579831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1280136841 + 109620900 = 35779^2 + 10470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389757741 - 2¹⁹ = 1389233453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389757441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694878870 + 694878871.

It is an arithmetic number, because the mean of its divisors is an integer number (694878871).

Almost surely, 2^1389757741 is an apocalyptic number.

It is an amenable number.

1389757741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389757741 is an equidigital number, since it uses as much as digits as its factorization.

1389757741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1481760, while the sum is 52.

The square root of 1389757741 is about 37279.4546768056. The cubic root of 1389757741 is about 1115.9541902656.

The spelling of 1389757741 in words is "one billion, three hundred eighty-nine million, seven hundred fifty-seven thousand, seven hundred forty-one".