870819841 has 4 divisors (see below), whose sum is σ = 871150000. Its totient is φ = 870489684.

The previous prime is 870819793. The next prime is 870819871. The reversal of 870819841 is 148918078.

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, and also an emirpimes, since its reverse is a distinct semiprime: 148918078 = 2 ⋅74459039.

It is a cyclic number.

It is not a de Polignac number, because 870819841 - 2¹¹ = 870817793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 870819791 and 870819800.

It is not an unprimeable number, because it can be changed into a prime (870819871) 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, 161091 + ... + 166408.

It is an arithmetic number, because the mean of its divisors is an integer number (217787500).

Almost surely, 2^870819841 is an apocalyptic number.

It is an amenable number.

870819841 is a deficient number, since it is larger than the sum of its proper divisors (330159).

870819841 is a wasteful number, since it uses less digits than its factorization.

870819841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330158.

The product of its (nonzero) digits is 129024, while the sum is 46.

The square root of 870819841 is about 29509.6567414804. The cubic root of 870819841 is about 954.9400439320.

The spelling of 870819841 in words is "eight hundred seventy million, eight hundred nineteen thousand, eight hundred forty-one".