33997393 has 4 divisors (see below), whose sum is σ = 34573680. Its totient is φ = 33421108.

The previous prime is 33997387. The next prime is 33997409. The reversal of 33997393 is 39379933.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39379933 = 23 ⋅1712171.

It is a cyclic number.

It is not a de Polignac number, because 33997393 - 2⁵ = 33997361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33997303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288055 + ... + 288172.

It is an arithmetic number, because the mean of its divisors is an integer number (8643420).

Almost surely, 2^33997393 is an apocalyptic number.

It is an amenable number.

33997393 is a deficient number, since it is larger than the sum of its proper divisors (576287).

33997393 is an equidigital number, since it uses as much as digits as its factorization.

33997393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576286.

The product of its digits is 413343, while the sum is 46.

The square root of 33997393 is about 5830.7283421542. The cubic root of 33997393 is about 323.9528998495.

The spelling of 33997393 in words is "thirty-three million, nine hundred ninety-seven thousand, three hundred ninety-three".