33893989 has 4 divisors (see below), whose sum is σ = 33953920. Its totient is φ = 33834060.

The previous prime is 33893983. The next prime is 33894013. The reversal of 33893989 is 98939833.

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 a cyclic number.

It is not a de Polignac number, because 33893989 - 2⁷ = 33893861 is a prime.

It is a super-2 number, since 2×33893989² = 2297604980664242, 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 (33893983) 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, 29109 + ... + 30250.

It is an arithmetic number, because the mean of its divisors is an integer number (8488480).

Almost surely, 2^33893989 is an apocalyptic number.

It is an amenable number.

33893989 is a deficient number, since it is larger than the sum of its proper divisors (59931).

33893989 is an equidigital number, since it uses as much as digits as its factorization.

33893989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59930.

The product of its digits is 1259712, while the sum is 52.

The square root of 33893989 is about 5821.8544296470. The cubic root of 33893989 is about 323.6241291025.

The spelling of 33893989 in words is "thirty-three million, eight hundred ninety-three thousand, nine hundred eighty-nine".