69855389 has 2 divisors, whose sum is σ = 69855390. Its totient is φ = 69855388.

The previous prime is 69855377. The next prime is 69855413. The reversal of 69855389 is 98355896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69388900 + 466489 = 8330^2 + 683^2 .

It is a cyclic number.

It is not a de Polignac number, because 69855389 - 2¹² = 69851293 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69855389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69855319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34927694 + 34927695.

It is an arithmetic number, because the mean of its divisors is an integer number (34927695).

Almost surely, 2^69855389 is an apocalyptic number.

It is an amenable number.

69855389 is a deficient number, since it is larger than the sum of its proper divisors (1).

69855389 is an equidigital number, since it uses as much as digits as its factorization.

69855389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 53.

The square root of 69855389 is about 8357.9536371052. The cubic root of 69855389 is about 411.8445328054.

The spelling of 69855389 in words is "sixty-nine million, eight hundred fifty-five thousand, three hundred eighty-nine".