33011997329 has 2 divisors, whose sum is σ = 33011997330. Its totient is φ = 33011997328.

The previous prime is 33011997311. The next prime is 33011997353. The reversal of 33011997329 is 92379911033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28030460929 + 4981536400 = 167423^2 + 70580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33011997329 is a prime.

It is not a weakly prime, because it can be changed into another prime (33011997229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16505998664 + 16505998665.

It is an arithmetic number, because the mean of its divisors is an integer number (16505998665).

Almost surely, 2^33011997329 is an apocalyptic number.

It is an amenable number.

33011997329 is a deficient number, since it is larger than the sum of its proper divisors (1).

33011997329 is an equidigital number, since it uses as much as digits as its factorization.

33011997329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 275562, while the sum is 47.

The spelling of 33011997329 in words is "thirty-three billion, eleven million, nine hundred ninety-seven thousand, three hundred twenty-nine".