29859840917 has 4 divisors (see below), whose sum is σ = 29866866060. Its totient is φ = 29852815776.

The previous prime is 29859840883. The next prime is 29859840949. The reversal of 29859840917 is 71904895892.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9213312196 + 20646528721 = 95986^2 + 143689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29859840917 is a prime.

It is a super-2 number, since 2×29859840917² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29859840917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29859840817) 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, 3506192 + ... + 3514697.

It is an arithmetic number, because the mean of its divisors is an integer number (7466716515).

Almost surely, 2^29859840917 is an apocalyptic number.

It is an amenable number.

29859840917 is a deficient number, since it is larger than the sum of its proper divisors (7025143).

29859840917 is an equidigital number, since it uses as much as digits as its factorization.

29859840917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7025142.

The product of its (nonzero) digits is 13063680, while the sum is 62.

The spelling of 29859840917 in words is "twenty-nine billion, eight hundred fifty-nine million, eight hundred forty thousand, nine hundred seventeen".