29942881 has 2 divisors, whose sum is σ = 29942882. Its totient is φ = 29942880.

The previous prime is 29942839. The next prime is 29942897. The reversal of 29942881 is 18824992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29593600 + 349281 = 5440^2 + 591^2 .

It is a cyclic number.

It is not a de Polignac number, because 29942881 - 2¹⁵ = 29910113 is a prime.

It is a super-2 number, since 2×29942881² = 1793152245160322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29942281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14971440 + 14971441.

It is an arithmetic number, because the mean of its divisors is an integer number (14971441).

Almost surely, 2^29942881 is an apocalyptic number.

It is an amenable number.

29942881 is a deficient number, since it is larger than the sum of its proper divisors (1).

29942881 is an equidigital number, since it uses as much as digits as its factorization.

29942881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 43.

The square root of 29942881 is about 5472.0088632969. The cubic root of 29942881 is about 310.5259230701.

The spelling of 29942881 in words is "twenty-nine million, nine hundred forty-two thousand, eight hundred eighty-one".