33721489 has 8 divisors (see below), whose sum is σ = 36136800. Its totient is φ = 31354176.

The previous prime is 33721487. The next prime is 33721507. The reversal of 33721489 is 98412733.

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 33721489 - 2¹ = 33721487 is a prime.

It is a super-2 number, since 2×33721489² = 2274277640754242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33721487) 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, 10539 + ... + 13360.

It is an arithmetic number, because the mean of its divisors is an integer number (4517100).

Almost surely, 2^33721489 is an apocalyptic number.

It is an amenable number.

33721489 is a deficient number, since it is larger than the sum of its proper divisors (2415311).

33721489 is a wasteful number, since it uses less digits than its factorization.

33721489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23999.

The product of its digits is 36288, while the sum is 37.

The square root of 33721489 is about 5807.0206646782. The cubic root of 33721489 is about 323.0741777385.

The spelling of 33721489 in words is "thirty-three million, seven hundred twenty-one thousand, four hundred eighty-nine".