33442913 has 4 divisors (see below), whose sum is σ = 38220480. Its totient is φ = 28665348.

The previous prime is 33442909. The next prime is 33442939. The reversal of 33442913 is 31924433.

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: 31924433 = 73 ⋅437321.

It is a cyclic number.

It is not a de Polignac number, because 33442913 - 2² = 33442909 is a prime.

It is a super-2 number, since 2×33442913² = 2236856859851138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33442973) 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, 2388773 + ... + 2388786.

It is an arithmetic number, because the mean of its divisors is an integer number (9555120).

Almost surely, 2^33442913 is an apocalyptic number.

It is an amenable number.

33442913 is a deficient number, since it is larger than the sum of its proper divisors (4777567).

33442913 is an equidigital number, since it uses as much as digits as its factorization.

33442913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777566.

The product of its digits is 7776, while the sum is 29.

The square root of 33442913 is about 5782.9847829646. The cubic root of 33442913 is about 322.1820691456.

The spelling of 33442913 in words is "thirty-three million, four hundred forty-two thousand, nine hundred thirteen".