33091979 has 8 divisors (see below), whose sum is σ = 35633520. Its totient is φ = 30616576.

The previous prime is 33091969. The next prime is 33091991. The reversal of 33091979 is 97919033.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33091979 - 2²⁴ = 16314763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33091969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15494 + ... + 17499.

It is an arithmetic number, because the mean of its divisors is an integer number (4454190).

Almost surely, 2^33091979 is an apocalyptic number.

33091979 is a deficient number, since it is larger than the sum of its proper divisors (2541541).

33091979 is a wasteful number, since it uses less digits than its factorization.

33091979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33069.

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

The square root of 33091979 is about 5752.5628201698. The cubic root of 33091979 is about 321.0511624147.

The spelling of 33091979 in words is "thirty-three million, ninety-one thousand, nine hundred seventy-nine".