33720969 has 4 divisors (see below), whose sum is σ = 44961296. Its totient is φ = 22480644.

The previous prime is 33720959. The next prime is 33720977. The reversal of 33720969 is 96902733.

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.

It is not a de Polignac number, because 33720969 - 2¹¹ = 33718921 is a prime.

It is a super-2 number, since 2×33720969² = 2274207500597922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (33720959) 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, 5620159 + ... + 5620164.

It is an arithmetic number, because the mean of its divisors is an integer number (11240324).

Almost surely, 2^33720969 is an apocalyptic number.

It is an amenable number.

33720969 is a deficient number, since it is larger than the sum of its proper divisors (11240327).

33720969 is a wasteful number, since it uses less digits than its factorization.

33720969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11240326.

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 33720969 is about 5806.9758911158. The cubic root of 33720969 is about 323.0725170819.

The spelling of 33720969 in words is "thirty-three million, seven hundred twenty thousand, nine hundred sixty-nine".