33500981 has 2 divisors, whose sum is σ = 33500982. Its totient is φ = 33500980.

The previous prime is 33500969. The next prime is 33500983. The reversal of 33500981 is 18900533.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20295025 + 13205956 = 4505^2 + 3634^2 .

It is a cyclic number.

It is not a de Polignac number, because 33500981 - 2⁶ = 33500917 is a prime.

It is a super-2 number, since 2×33500981² = 2244631455924722, which contains 22 as substring.

Together with 33500983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33500983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16750490 + 16750491.

It is an arithmetic number, because the mean of its divisors is an integer number (16750491).

Almost surely, 2^33500981 is an apocalyptic number.

It is an amenable number.

33500981 is a deficient number, since it is larger than the sum of its proper divisors (1).

33500981 is an equidigital number, since it uses as much as digits as its factorization.

33500981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 33500981 is about 5788.0031962673. The cubic root of 33500981 is about 322.3684330027.

The spelling of 33500981 in words is "thirty-three million, five hundred thousand, nine hundred eighty-one".