29998143 has 18 divisors (see below), whose sum is σ = 50405784. Its totient is φ = 17141544.

The previous prime is 29998121. The next prime is 29998181. The reversal of 29998143 is 34189992.

It is not a de Polignac number, because 29998143 - 2⁹ = 29997631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29998343) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33571 + ... + 34452.

Almost surely, 2^29998143 is an apocalyptic number.

29998143 is a deficient number, since it is larger than the sum of its proper divisors (20407641).

29998143 is a wasteful number, since it uses less digits than its factorization.

29998143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68043 (or 68033 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 29998143 is about 5477.0560522967. The cubic root of 29998143 is about 310.7168392067.

The spelling of 29998143 in words is "twenty-nine million, nine hundred ninety-eight thousand, one hundred forty-three".