33389987 has 8 divisors (see below), whose sum is σ = 33932304. Its totient is φ = 32851168.

The previous prime is 33389969. The next prime is 33390029. The reversal of 33389987 is 78998333.

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 33389987 - 2⁸ = 33389731 is a prime.

It is a super-2 number, since 2×33389987² = 2229782463720338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33389957) 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, 23633 + ... + 25005.

It is an arithmetic number, because the mean of its divisors is an integer number (4241538).

Almost surely, 2^33389987 is an apocalyptic number.

33389987 is a deficient number, since it is larger than the sum of its proper divisors (542317).

33389987 is a wasteful number, since it uses less digits than its factorization.

33389987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749.

The product of its digits is 979776, while the sum is 50.

The square root of 33389987 is about 5778.4069604001. The cubic root of 33389987 is about 322.0120200495.

The spelling of 33389987 in words is "thirty-three million, three hundred eighty-nine thousand, nine hundred eighty-seven".