29081881 has 4 divisors (see below), whose sum is σ = 29256192. Its totient is φ = 28907572.

The previous prime is 29081873. The next prime is 29081887. The reversal of 29081881 is 18818092.

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 29081881 - 2³ = 29081873 is a prime.

It is a super-2 number, since 2×29081881² = 1691511604996322, 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 29081881.

It is not an unprimeable number, because it can be changed into a prime (29081887) 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 3 ways as a sum of consecutive naturals, for example, 86905 + ... + 87238.

It is an arithmetic number, because the mean of its divisors is an integer number (7314048).

Almost surely, 2^29081881 is an apocalyptic number.

It is an amenable number.

29081881 is a deficient number, since it is larger than the sum of its proper divisors (174311).

29081881 is a wasteful number, since it uses less digits than its factorization.

29081881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174310.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 29081881 is about 5392.7619083360. The cubic root of 29081881 is about 307.5205653067.

The spelling of 29081881 in words is "twenty-nine million, eighty-one thousand, eight hundred eighty-one".