1385907889 has 2 divisors, whose sum is σ = 1385907890. Its totient is φ = 1385907888.

The previous prime is 1385907869. The next prime is 1385907907. The reversal of 1385907889 is 9887095831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 915365025 + 470542864 = 30255^2 + 21692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385907889 - 2⁵ = 1385907857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1385907869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692953944 + 692953945.

It is an arithmetic number, because the mean of its divisors is an integer number (692953945).

Almost surely, 2^1385907889 is an apocalyptic number.

It is an amenable number.

1385907889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385907889 is an equidigital number, since it uses as much as digits as its factorization.

1385907889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The square root of 1385907889 is about 37227.7838314343. The cubic root of 1385907889 is about 1114.9227798815.

The spelling of 1385907889 in words is "one billion, three hundred eighty-five million, nine hundred seven thousand, eight hundred eighty-nine".