844120117 has 4 divisors (see below), whose sum is σ = 847258380. Its totient is φ = 840981856.

The previous prime is 844120103. The next prime is 844120153. The reversal of 844120117 is 711021448.

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 16924996 + 827195121 = 4114^2 + 28761^2 .

It is a cyclic number.

It is not a de Polignac number, because 844120117 - 2¹⁹ = 843595829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844720117) 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, 1568728 + ... + 1569265.

It is an arithmetic number, because the mean of its divisors is an integer number (211814595).

Almost surely, 2^844120117 is an apocalyptic number.

It is an amenable number.

844120117 is a deficient number, since it is larger than the sum of its proper divisors (3138263).

844120117 is a wasteful number, since it uses less digits than its factorization.

844120117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138262.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 844120117 is about 29053.7453179448. The cubic root of 844120117 is about 945.0789355786.

The spelling of 844120117 in words is "eight hundred forty-four million, one hundred twenty thousand, one hundred seventeen".