33013091 has 4 divisors (see below), whose sum is σ = 33073992. Its totient is φ = 32952192.

The previous prime is 33013087. The next prime is 33013147. The reversal of 33013091 is 19031033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19031033 = 7 ⋅2718719.

It is a cyclic number.

It is not a de Polignac number, because 33013091 - 2² = 33013087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33013021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29630 + ... + 30723.

It is an arithmetic number, because the mean of its divisors is an integer number (8268498).

Almost surely, 2^33013091 is an apocalyptic number.

33013091 is a deficient number, since it is larger than the sum of its proper divisors (60901).

33013091 is an equidigital number, since it uses as much as digits as its factorization.

33013091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60900.

The product of its (nonzero) digits is 243, while the sum is 20.

The square root of 33013091 is about 5745.7019588559. The cubic root of 33013091 is about 320.7958413640.

The spelling of 33013091 in words is "thirty-three million, thirteen thousand, ninety-one".