33989939453 has 2 divisors, whose sum is σ = 33989939454. Its totient is φ = 33989939452.

The previous prime is 33989939449. The next prime is 33989939561. The reversal of 33989939453 is 35493998933.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25146982084 + 8842957369 = 158578^2 + 94037^2 .

It is a cyclic number.

It is not a de Polignac number, because 33989939453 - 2² = 33989939449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33989939453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33989909453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16994969726 + 16994969727.

It is an arithmetic number, because the mean of its divisors is an integer number (16994969727).

Almost surely, 2^33989939453 is an apocalyptic number.

It is an amenable number.

33989939453 is a deficient number, since it is larger than the sum of its proper divisors (1).

33989939453 is an equidigital number, since it uses as much as digits as its factorization.

33989939453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85030560, while the sum is 65.

The spelling of 33989939453 in words is "thirty-three billion, nine hundred eighty-nine million, nine hundred thirty-nine thousand, four hundred fifty-three".