29144981 has 4 divisors (see below), whose sum is σ = 29417472. Its totient is φ = 28872492.

The previous prime is 29144977. The next prime is 29145001. The reversal of 29144981 is 18944192.

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 29144981 - 2² = 29144977 is a prime.

It is a super-2 number, since 2×29144981² = 1698859834980722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29144281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136085 + ... + 136298.

It is an arithmetic number, because the mean of its divisors is an integer number (7354368).

Almost surely, 2^29144981 is an apocalyptic number.

It is an amenable number.

29144981 is a deficient number, since it is larger than the sum of its proper divisors (272491).

29144981 is a wasteful number, since it uses less digits than its factorization.

29144981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272490.

The product of its digits is 20736, while the sum is 38.

The square root of 29144981 is about 5398.6091727407. The cubic root of 29144981 is about 307.7428174404.

The spelling of 29144981 in words is "twenty-nine million, one hundred forty-four thousand, nine hundred eighty-one".