33990897 has 4 divisors (see below), whose sum is σ = 45321200. Its totient is φ = 22660596.

The previous prime is 33990893. The next prime is 33990899. The reversal of 33990897 is 79809933.

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.

It is not a de Polignac number, because 33990897 - 2² = 33990893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33990893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5665147 + ... + 5665152.

It is an arithmetic number, because the mean of its divisors is an integer number (11330300).

Almost surely, 2^33990897 is an apocalyptic number.

It is an amenable number.

33990897 is a deficient number, since it is larger than the sum of its proper divisors (11330303).

33990897 is a wasteful number, since it uses less digits than its factorization.

33990897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11330302.

The product of its (nonzero) digits is 367416, while the sum is 48.

The square root of 33990897 is about 5830.1712667811. The cubic root of 33990897 is about 323.9322655998.

The spelling of 33990897 in words is "thirty-three million, nine hundred ninety thousand, eight hundred ninety-seven".