827661017 has 4 divisors (see below), whose sum is σ = 828110976. Its totient is φ = 827211060.

The previous prime is 827661001. The next prime is 827661019. The reversal of 827661017 is 710166728.

827661017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 827661017 - 2⁴ = 827661001 is a prime.

It is a super-2 number, since 2×827661017² = 1370045518122948578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (827661019) 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, 222209 + ... + 225902.

It is an arithmetic number, because the mean of its divisors is an integer number (207027744).

Almost surely, 2^827661017 is an apocalyptic number.

It is an amenable number.

827661017 is a deficient number, since it is larger than the sum of its proper divisors (449959).

827661017 is a wasteful number, since it uses less digits than its factorization.

827661017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449958.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 827661017 is about 28769.0983000858. The cubic root of 827661017 is about 938.8960243837.

The spelling of 827661017 in words is "eight hundred twenty-seven million, six hundred sixty-one thousand, seventeen".