33388013 has 4 divisors (see below), whose sum is σ = 33511488. Its totient is φ = 33264540.

The previous prime is 33388009. The next prime is 33388031. The reversal of 33388013 is 31088333.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31088333 = 151 ⋅205883.

It is a cyclic number.

It is not a de Polignac number, because 33388013 - 2² = 33388009 is a prime.

It is a super-2 number, since 2×33388013² = 2229518824176338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33388093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61331 + ... + 61872.

It is an arithmetic number, because the mean of its divisors is an integer number (8377872).

Almost surely, 2^33388013 is an apocalyptic number.

It is an amenable number.

33388013 is a deficient number, since it is larger than the sum of its proper divisors (123475).

33388013 is a wasteful number, since it uses less digits than its factorization.

33388013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123474.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 33388013 is about 5778.2361495529. The cubic root of 33388013 is about 322.0056741924.

The spelling of 33388013 in words is "thirty-three million, three hundred eighty-eight thousand, thirteen".