29868684669 has 6 divisors (see below), whose sum is σ = 43143655646. Its totient is φ = 19912456440.

The previous prime is 29868684661. The next prime is 29868684673. The reversal of 29868684669 is 96648686892.

29868684669 is a `hidden beast` number, since 2 + 9 + 86 + 86 + 8 + 466 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28102163769 + 1766520900 = 167637^2 + 42030^2 .

It is not a de Polignac number, because 29868684669 - 2³ = 29868684661 is a prime.

It is a super-2 number, since 2×29868684669² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 29868684597 and 29868684606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29868684661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1659371362 + ... + 1659371379.

Almost surely, 2^29868684669 is an apocalyptic number.

It is an amenable number.

29868684669 is a deficient number, since it is larger than the sum of its proper divisors (13274970977).

29868684669 is a wasteful number, since it uses less digits than its factorization.

29868684669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3318742747 (or 3318742744 counting only the distinct ones).

The product of its digits is 429981696, while the sum is 72.

The spelling of 29868684669 in words is "twenty-nine billion, eight hundred sixty-eight million, six hundred eighty-four thousand, six hundred sixty-nine".