33997091 has 2 divisors, whose sum is σ = 33997092. Its totient is φ = 33997090.

The previous prime is 33997079. The next prime is 33997123. The reversal of 33997091 is 19079933.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33997091 is a prime.

It is not a weakly prime, because it can be changed into another prime (33997031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16998545 + 16998546.

It is an arithmetic number, because the mean of its divisors is an integer number (16998546).

Almost surely, 2^33997091 is an apocalyptic number.

33997091 is a deficient number, since it is larger than the sum of its proper divisors (1).

33997091 is an equidigital number, since it uses as much as digits as its factorization.

33997091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 33997091 is about 5830.7024448174. The cubic root of 33997091 is about 323.9519406184.

The spelling of 33997091 in words is "thirty-three million, nine hundred ninety-seven thousand, ninety-one".