29686320889 has 4 divisors (see below), whose sum is σ = 30488653924. Its totient is φ = 28883987856.

The previous prime is 29686320877. The next prime is 29686320893. The reversal of 29686320889 is 98802368692.

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 28665198864 + 1021122025 = 169308^2 + 31955^2 .

It is a cyclic number.

It is not a de Polignac number, because 29686320889 - 2²³ = 29677932281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29686320899) 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, 401166462 + ... + 401166535.

It is an arithmetic number, because the mean of its divisors is an integer number (7622163481).

Almost surely, 2^29686320889 is an apocalyptic number.

It is an amenable number.

29686320889 is a deficient number, since it is larger than the sum of its proper divisors (802333035).

29686320889 is an equidigital number, since it uses as much as digits as its factorization.

29686320889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802333034.

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 29686320889 in words is "twenty-nine billion, six hundred eighty-six million, three hundred twenty thousand, eight hundred eighty-nine".