29142647 has 4 divisors (see below), whose sum is σ = 29177280. Its totient is φ = 29108016.

The previous prime is 29142613. The next prime is 29142661. The reversal of 29142647 is 74624192.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29142647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29142667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16022 + ... + 17747.

It is an arithmetic number, because the mean of its divisors is an integer number (7294320).

Almost surely, 2^29142647 is an apocalyptic number.

29142647 is a deficient number, since it is larger than the sum of its proper divisors (34633).

29142647 is an equidigital number, since it uses as much as digits as its factorization.

29142647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34632.

The product of its digits is 24192, while the sum is 35.

The square root of 29142647 is about 5398.3930016256. The cubic root of 29142647 is about 307.7346022934.

The spelling of 29142647 in words is "twenty-nine million, one hundred forty-two thousand, six hundred forty-seven".