29481981 has 8 divisors (see below), whose sum is σ = 39339264. Its totient is φ = 19639680.

The previous prime is 29481979. The next prime is 29481983. The reversal of 29481981 is 18918492.

It is an interprime number because it is at equal distance from previous prime (29481979) and next prime (29481983).

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

It is not a de Polignac number, because 29481981 - 2¹ = 29481979 is a prime.

It is a super-2 number, since 2×29481981² = 1738374407368722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29481983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2196 + ... + 7986.

It is an arithmetic number, because the mean of its divisors is an integer number (4917408).

Almost surely, 2^29481981 is an apocalyptic number.

It is an amenable number.

29481981 is a deficient number, since it is larger than the sum of its proper divisors (9857283).

29481981 is a wasteful number, since it uses less digits than its factorization.

29481981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7491.

The product of its digits is 41472, while the sum is 42.

The square root of 29481981 is about 5429.7312088169. The cubic root of 29481981 is about 308.9244062629.

The spelling of 29481981 in words is "twenty-nine million, four hundred eighty-one thousand, nine hundred eighty-one".