33904397 has 2 divisors, whose sum is σ = 33904398. Its totient is φ = 33904396.

The previous prime is 33904357. The next prime is 33904411. The reversal of 33904397 is 79340933.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33512521 + 391876 = 5789^2 + 626^2 .

It is a cyclic number.

It is not a de Polignac number, because 33904397 - 2⁸ = 33904141 is a prime.

It is a super-2 number, since 2×33904397² = 2299016271867218, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33904397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33904337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16952198 + 16952199.

It is an arithmetic number, because the mean of its divisors is an integer number (16952199).

Almost surely, 2^33904397 is an apocalyptic number.

It is an amenable number.

33904397 is a deficient number, since it is larger than the sum of its proper divisors (1).

33904397 is an equidigital number, since it uses as much as digits as its factorization.

33904397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 38.

The square root of 33904397 is about 5822.7482342962. The cubic root of 33904397 is about 323.6572513494.

The spelling of 33904397 in words is "thirty-three million, nine hundred four thousand, three hundred ninety-seven".