29172716899 has 4 divisors (see below), whose sum is σ = 29175671464. Its totient is φ = 29169762336.

The previous prime is 29172716897. The next prime is 29172716917. The reversal of 29172716899 is 99861727192.

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

It is a cyclic number.

It is not a de Polignac number, because 29172716899 - 2¹ = 29172716897 is a prime.

It is a super-2 number, since 2×29172716899² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29172716897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1462422 + ... + 1482235.

It is an arithmetic number, because the mean of its divisors is an integer number (7293917866).

Almost surely, 2^29172716899 is an apocalyptic number.

29172716899 is a deficient number, since it is larger than the sum of its proper divisors (2954565).

29172716899 is an equidigital number, since it uses as much as digits as its factorization.

29172716899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954564.

The product of its digits is 6858432, while the sum is 61.

The spelling of 29172716899 in words is "twenty-nine billion, one hundred seventy-two million, seven hundred sixteen thousand, eight hundred ninety-nine".