33388961 has 4 divisors (see below), whose sum is σ = 33413424. Its totient is φ = 33364500.

The previous prime is 33388951. The next prime is 33388997. The reversal of 33388961 is 16988333.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33388961 is a prime.

It is a super-2 number, since 2×33388961² = 2229645433319042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33388951) 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, 10055 + ... + 12956.

It is an arithmetic number, because the mean of its divisors is an integer number (8353356).

Almost surely, 2^33388961 is an apocalyptic number.

It is an amenable number.

33388961 is a deficient number, since it is larger than the sum of its proper divisors (24463).

33388961 is a wasteful number, since it uses less digits than its factorization.

33388961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24462.

The product of its digits is 93312, while the sum is 41.

The square root of 33388961 is about 5778.3181809243. The cubic root of 33388961 is about 322.0087217781.

The spelling of 33388961 in words is "thirty-three million, three hundred eighty-eight thousand, nine hundred sixty-one".