29421881 has 2 divisors, whose sum is σ = 29421882. Its totient is φ = 29421880.

The previous prime is 29421871. The next prime is 29421913. The reversal of 29421881 is 18812492.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28944400 + 477481 = 5380^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 29421881 - 2¹⁰ = 29420857 is a prime.

It is a super-2 number, since 2×29421881² = 1731294163156322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29421811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14710940 + 14710941.

It is an arithmetic number, because the mean of its divisors is an integer number (14710941).

Almost surely, 2^29421881 is an apocalyptic number.

It is an amenable number.

29421881 is a deficient number, since it is larger than the sum of its proper divisors (1).

29421881 is an equidigital number, since it uses as much as digits as its factorization.

29421881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 35.

The square root of 29421881 is about 5424.1940415144. The cubic root of 29421881 is about 308.7143458968.

The spelling of 29421881 in words is "twenty-nine million, four hundred twenty-one thousand, eight hundred eighty-one".