29143681 has 8 divisors (see below), whose sum is σ = 33987200. Its totient is φ = 24980004.

The previous prime is 29143669. The next prime is 29143703. The reversal of 29143681 is 18634192.

It is not a de Polignac number, because 29143681 - 2⁵ = 29143649 is a prime.

It is a super-2 number, since 2×29143681² = 1698708284459522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29143181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42141 + ... + 42826.

It is an arithmetic number, because the mean of its divisors is an integer number (4248400).

Almost surely, 2^29143681 is an apocalyptic number.

It is an amenable number.

29143681 is a deficient number, since it is larger than the sum of its proper divisors (4843519).

29143681 is an frugal number, since it uses more digits than its factorization.

29143681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84988 (or 84974 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 29143681 is about 5398.4887700170. The cubic root of 29143681 is about 307.7382417914.

The spelling of 29143681 in words is "twenty-nine million, one hundred forty-three thousand, six hundred eighty-one".