33997689 has 12 divisors (see below), whose sum is σ = 53572272. Its totient is φ = 20604600.

The previous prime is 33997687. The next prime is 33997697. The reversal of 33997689 is 98679933.

It is not a de Polignac number, because 33997689 - 2¹ = 33997687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (33997681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171607 + ... + 171804.

It is an arithmetic number, because the mean of its divisors is an integer number (4464356).

Almost surely, 2^33997689 is an apocalyptic number.

It is an amenable number.

33997689 is a deficient number, since it is larger than the sum of its proper divisors (19574583).

33997689 is a wasteful number, since it uses less digits than its factorization.

33997689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343428 (or 343425 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 33997689 is about 5830.7537248627. The cubic root of 33997689 is about 323.9538400174.

The spelling of 33997689 in words is "thirty-three million, nine hundred ninety-seven thousand, six hundred eighty-nine".