33723421 has 8 divisors (see below), whose sum is σ = 34080480. Its totient is φ = 33368592.

The previous prime is 33723413. The next prime is 33723439. The reversal of 33723421 is 12432733.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33723421 - 2³ = 33723413 is a prime.

It is a super-2 number, since 2×33723421² = 2274538247886482, 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 (33724421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52126 + ... + 52768.

It is an arithmetic number, because the mean of its divisors is an integer number (4260060).

Almost surely, 2^33723421 is an apocalyptic number.

It is an amenable number.

33723421 is a deficient number, since it is larger than the sum of its proper divisors (357059).

33723421 is a wasteful number, since it uses less digits than its factorization.

33723421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115.

The product of its digits is 3024, while the sum is 25.

The square root of 33723421 is about 5807.1870126594. The cubic root of 33723421 is about 323.0803475668.

The spelling of 33723421 in words is "thirty-three million, seven hundred twenty-three thousand, four hundred twenty-one".