838842089 has 4 divisors (see below), whose sum is σ = 842106324. Its totient is φ = 835577856.

The previous prime is 838842071. The next prime is 838842097. The reversal of 838842089 is 980248838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 980248838 = 2 ⋅490124419.

It can be written as a sum of positive squares in 2 ways, for example, as 698016400 + 140825689 = 26420^2 + 11867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-838842089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (838842029) 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, 1631732 + ... + 1632245.

It is an arithmetic number, because the mean of its divisors is an integer number (210526581).

Almost surely, 2^838842089 is an apocalyptic number.

It is an amenable number.

838842089 is a deficient number, since it is larger than the sum of its proper divisors (3264235).

838842089 is a wasteful number, since it uses less digits than its factorization.

838842089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264234.

The product of its (nonzero) digits is 884736, while the sum is 50.

The square root of 838842089 is about 28962.7707410738. The cubic root of 838842089 is about 943.1050514830.

The spelling of 838842089 in words is "eight hundred thirty-eight million, eight hundred forty-two thousand, eighty-nine".