33956921 has 2 divisors, whose sum is σ = 33956922. Its totient is φ = 33956920.

The previous prime is 33956893. The next prime is 33956927. The reversal of 33956921 is 12965933.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22934521 + 11022400 = 4789^2 + 3320^2 .

It is a cyclic number.

It is not a de Polignac number, because 33956921 - 2²² = 29762617 is a prime.

It is equal to p_2086895 and since 33956921 and 2086895 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (33956927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16978460 + 16978461.

It is an arithmetic number, because the mean of its divisors is an integer number (16978461).

Almost surely, 2^33956921 is an apocalyptic number.

It is an amenable number.

33956921 is a deficient number, since it is larger than the sum of its proper divisors (1).

33956921 is an equidigital number, since it uses as much as digits as its factorization.

33956921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 38.

The square root of 33956921 is about 5827.2567302291. The cubic root of 33956921 is about 323.8242995197.

The spelling of 33956921 in words is "thirty-three million, nine hundred fifty-six thousand, nine hundred twenty-one".