103185389 has 2 divisors, whose sum is σ = 103185390. Its totient is φ = 103185388.

The previous prime is 103185377. The next prime is 103185413. The reversal of 103185389 is 983581301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93760489 + 9424900 = 9683^2 + 3070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103185389 is a prime.

It is a super-3 number, since 3×103185389³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103185319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51592694 + 51592695.

It is an arithmetic number, because the mean of its divisors is an integer number (51592695).

Almost surely, 2^103185389 is an apocalyptic number.

It is an amenable number.

103185389 is a deficient number, since it is larger than the sum of its proper divisors (1).

103185389 is an equidigital number, since it uses as much as digits as its factorization.

103185389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 103185389 is about 10158.0209194508. The cubic root of 103185389 is about 469.0358824040.

The spelling of 103185389 in words is "one hundred three million, one hundred eighty-five thousand, three hundred eighty-nine".