120817829 has 4 divisors (see below), whose sum is σ = 131801280. Its totient is φ = 109834380.

The previous prime is 120817783. The next prime is 120817843. The reversal of 120817829 is 928718021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120817829 - 2²⁰ = 119769253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120817792 and 120817801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120817849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5491709 + ... + 5491730.

It is an arithmetic number, because the mean of its divisors is an integer number (32950320).

Almost surely, 2^120817829 is an apocalyptic number.

It is an amenable number.

120817829 is a deficient number, since it is larger than the sum of its proper divisors (10983451).

120817829 is a wasteful number, since it uses less digits than its factorization.

120817829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10983450.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 120817829 is about 10991.7163809844. The cubic root of 120817829 is about 494.3604010035.

The spelling of 120817829 in words is "one hundred twenty million, eight hundred seventeen thousand, eight hundred twenty-nine".