33979521 has 8 divisors (see below), whose sum is σ = 45334944. Its totient is φ = 22638560.

The previous prime is 33979511. The next prime is 33979553. The reversal of 33979521 is 12597933.

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 33979521 - 2⁵ = 33979489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33979521.

It is not an unprimeable number, because it can be changed into a prime (33979511) 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, 4426 + ... + 9356.

It is an arithmetic number, because the mean of its divisors is an integer number (5666868).

Almost surely, 2^33979521 is an apocalyptic number.

It is an amenable number.

33979521 is a deficient number, since it is larger than the sum of its proper divisors (11355423).

33979521 is a wasteful number, since it uses less digits than its factorization.

33979521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7231.

The product of its digits is 51030, while the sum is 39.

The square root of 33979521 is about 5829.1955705740. The cubic root of 33979521 is about 323.8961239172.

The spelling of 33979521 in words is "thirty-three million, nine hundred seventy-nine thousand, five hundred twenty-one".