33989940671 has 2 divisors, whose sum is σ = 33989940672. Its totient is φ = 33989940670.

The previous prime is 33989940653. The next prime is 33989940703. The reversal of 33989940671 is 17604998933.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33989940671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33989940671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33989949671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16994970335 + 16994970336.

It is an arithmetic number, because the mean of its divisors is an integer number (16994970336).

Almost surely, 2^33989940671 is an apocalyptic number.

33989940671 is a deficient number, since it is larger than the sum of its proper divisors (1).

33989940671 is an equidigital number, since it uses as much as digits as its factorization.

33989940671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 33989940671 in words is "thirty-three billion, nine hundred eighty-nine million, nine hundred forty thousand, six hundred seventy-one".