33421439 has 4 divisors (see below), whose sum is σ = 35387424. Its totient is φ = 31455456.

The previous prime is 33421433. The next prime is 33421457. The reversal of 33421439 is 93412433.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 33421439 - 2¹² = 33417343 is a prime.

It is a super-2 number, since 2×33421439² = 2233985169661442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33421433) 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, 982967 + ... + 983000.

It is an arithmetic number, because the mean of its divisors is an integer number (8846856).

Almost surely, 2^33421439 is an apocalyptic number.

33421439 is a deficient number, since it is larger than the sum of its proper divisors (1965985).

33421439 is a wasteful number, since it uses less digits than its factorization.

33421439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965984.

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

The square root of 33421439 is about 5781.1278311416. The cubic root of 33421439 is about 322.1130956972.

The spelling of 33421439 in words is "thirty-three million, four hundred twenty-one thousand, four hundred thirty-nine".