29147857217 has 4 divisors (see below), whose sum is σ = 29340889536. Its totient is φ = 28954824900.

The previous prime is 29147857201. The next prime is 29147857241. The reversal of 29147857217 is 71275874192.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29147857217 - 2⁴ = 29147857201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29147847217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96515933 + ... + 96516234.

It is an arithmetic number, because the mean of its divisors is an integer number (7335222384).

Almost surely, 2^29147857217 is an apocalyptic number.

It is an amenable number.

29147857217 is a deficient number, since it is larger than the sum of its proper divisors (193032319).

29147857217 is a wasteful number, since it uses less digits than its factorization.

29147857217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193032318.

The product of its digits is 1975680, while the sum is 53.

The spelling of 29147857217 in words is "twenty-nine billion, one hundred forty-seven million, eight hundred fifty-seven thousand, two hundred seventeen".