33126913 has 4 divisors (see below), whose sum is σ = 33147220. Its totient is φ = 33106608.

The previous prime is 33126901. The next prime is 33126943. The reversal of 33126913 is 31962133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31962133 = 7 ⋅4566019.

It can be written as a sum of positive squares in 2 ways, for example, as 21790224 + 11336689 = 4668^2 + 3367^2 .

It is a cyclic number.

It is not a de Polignac number, because 33126913 - 2⁵ = 33126881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33126943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7470 + ... + 11047.

It is an arithmetic number, because the mean of its divisors is an integer number (8286805).

Almost surely, 2^33126913 is an apocalyptic number.

It is an amenable number.

33126913 is a deficient number, since it is larger than the sum of its proper divisors (20307).

33126913 is a wasteful number, since it uses less digits than its factorization.

33126913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20306.

The product of its digits is 2916, while the sum is 28.

The square root of 33126913 is about 5755.5984050314. The cubic root of 33126913 is about 321.1640967000.

The spelling of 33126913 in words is "thirty-three million, one hundred twenty-six thousand, nine hundred thirteen".