33427981 has 8 divisors (see below), whose sum is σ = 35020800. Its totient is φ = 31864560.

The previous prime is 33427949. The next prime is 33427991. The reversal of 33427981 is 18972433.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33427981 - 2⁵ = 33427949 is a prime.

It is a super-2 number, since 2×33427981² = 2234859827472722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33427981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33427921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5005 + ... + 9586.

It is an arithmetic number, because the mean of its divisors is an integer number (4377600).

Almost surely, 2^33427981 is an apocalyptic number.

It is an amenable number.

33427981 is a deficient number, since it is larger than the sum of its proper divisors (1592819).

33427981 is a wasteful number, since it uses less digits than its factorization.

33427981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14699.

The product of its digits is 36288, while the sum is 37.

The square root of 33427981 is about 5781.6936100074. The cubic root of 33427981 is about 322.1341114130.

The spelling of 33427981 in words is "thirty-three million, four hundred twenty-seven thousand, nine hundred eighty-one".