29139494689 has 8 divisors (see below), whose sum is σ = 29329600040. Its totient is φ = 28949446656.

The previous prime is 29139494663. The next prime is 29139494693. The reversal of 29139494689 is 98649493192.

It can be written as a sum of positive squares in 4 ways, for example, as 1022912289 + 28116582400 = 31983^2 + 167680^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29139494689 - 2⁷ = 29139494561 is a prime.

It is a super-2 number, since 2×29139494689² (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 29139494689.

It is not an unprimeable number, because it can be changed into a prime (29139494389) 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 7 ways as a sum of consecutive naturals, for example, 1571617 + ... + 1590049.

It is an arithmetic number, because the mean of its divisors is an integer number (3666200005).

Almost surely, 2^29139494689 is an apocalyptic number.

It is an amenable number.

29139494689 is a deficient number, since it is larger than the sum of its proper divisors (190105351).

29139494689 is a wasteful number, since it uses less digits than its factorization.

29139494689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28659.

The product of its digits is 30233088, while the sum is 64.

The spelling of 29139494689 in words is "twenty-nine billion, one hundred thirty-nine million, four hundred ninety-four thousand, six hundred eighty-nine".