33090971 has 4 divisors (see below), whose sum is σ = 33103344. Its totient is φ = 33078600.

The previous prime is 33090949. The next prime is 33091007. The reversal of 33090971 is 17909033.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17909033 = 67 ⋅267299.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33090971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33090371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320 + ... + 8141.

It is an arithmetic number, because the mean of its divisors is an integer number (8275836).

Almost surely, 2^33090971 is an apocalyptic number.

33090971 is a deficient number, since it is larger than the sum of its proper divisors (12373).

33090971 is an equidigital number, since it uses as much as digits as its factorization.

33090971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12372.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 33090971 is about 5752.4752063786. The cubic root of 33090971 is about 321.0479025829.

The spelling of 33090971 in words is "thirty-three million, ninety thousand, nine hundred seventy-one".