33397389 has 6 divisors (see below), whose sum is σ = 48240686. Its totient is φ = 22264920.

The previous prime is 33397387. The next prime is 33397409. The reversal of 33397389 is 98379333.

It can be written as a sum of positive squares in only one way, i.e., 32661225 + 736164 = 5715^2 + 858^2 .

It is not a de Polignac number, because 33397389 - 2¹ = 33397387 is a prime.

It is a super-2 number, since 2×33397389² = 2230771184034642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33397387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1855402 + ... + 1855419.

Almost surely, 2^33397389 is an apocalyptic number.

It is an amenable number.

33397389 is a deficient number, since it is larger than the sum of its proper divisors (14843297).

33397389 is a wasteful number, since it uses less digits than its factorization.

33397389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3710827 (or 3710824 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 33397389 is about 5779.0474128527. The cubic root of 33397389 is about 322.0358131791.

The spelling of 33397389 in words is "thirty-three million, three hundred ninety-seven thousand, three hundred eighty-nine".