827078817 has 4 divisors (see below), whose sum is σ = 1102771760. Its totient is φ = 551385876.

The previous prime is 827078807. The next prime is 827078867. The reversal of 827078817 is 718870728.

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 not a de Polignac number, because 827078817 - 2⁴ = 827078801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (827078807) 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, 137846467 + ... + 137846472.

It is an arithmetic number, because the mean of its divisors is an integer number (275692940).

Almost surely, 2^827078817 is an apocalyptic number.

It is an amenable number.

827078817 is a deficient number, since it is larger than the sum of its proper divisors (275692943).

827078817 is a wasteful number, since it uses less digits than its factorization.

827078817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275692942.

The product of its (nonzero) digits is 351232, while the sum is 48.

The square root of 827078817 is about 28758.9780242623. The cubic root of 827078817 is about 938.6758241347.

The spelling of 827078817 in words is "eight hundred twenty-seven million, seventy-eight thousand, eight hundred seventeen".