33981493 has 16 divisors (see below), whose sum is σ = 42117376. Its totient is φ = 26697600.

The previous prime is 33981491. The next prime is 33981509. The reversal of 33981493 is 39418933.

It is a cyclic number.

It is not a de Polignac number, because 33981493 - 2¹ = 33981491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33981491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12505 + ... + 14977.

It is an arithmetic number, because the mean of its divisors is an integer number (2632336).

Almost surely, 2^33981493 is an apocalyptic number.

It is an amenable number.

33981493 is a deficient number, since it is larger than the sum of its proper divisors (8135883).

33981493 is a wasteful number, since it uses less digits than its factorization.

33981493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644.

The product of its digits is 69984, while the sum is 40.

The square root of 33981493 is about 5829.3647166737. The cubic root of 33981493 is about 323.9023895618.

The spelling of 33981493 in words is "thirty-three million, nine hundred eighty-one thousand, four hundred ninety-three".