33194921 has 2 divisors, whose sum is σ = 33194922. Its totient is φ = 33194920.

The previous prime is 33194867. The next prime is 33194923. The reversal of 33194921 is 12949133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26666896 + 6528025 = 5164^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 33194921 - 2²² = 29000617 is a prime.

It is a super-2 number, since 2×33194921² = 2203805560392482, which contains 22 as substring.

Together with 33194923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33194923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16597460 + 16597461.

It is an arithmetic number, because the mean of its divisors is an integer number (16597461).

Almost surely, 2^33194921 is an apocalyptic number.

It is an amenable number.

33194921 is a deficient number, since it is larger than the sum of its proper divisors (1).

33194921 is an equidigital number, since it uses as much as digits as its factorization.

33194921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 32.

The square root of 33194921 is about 5761.5033628386. The cubic root of 33194921 is about 321.3837247531.

The spelling of 33194921 in words is "thirty-three million, one hundred ninety-four thousand, nine hundred twenty-one".