820270617 has 8 divisors (see below), whose sum is σ = 1094503200. Its totient is φ = 546442560.

The previous prime is 820270609. The next prime is 820270631. The reversal of 820270617 is 716072028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 820270617 - 2³ = 820270609 is a prime.

It is a super-2 number, since 2×820270617² = 1345687770227121378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (820270697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96367 + ... + 104532.

It is an arithmetic number, because the mean of its divisors is an integer number (136812900).

Almost surely, 2^820270617 is an apocalyptic number.

It is an amenable number.

820270617 is a deficient number, since it is larger than the sum of its proper divisors (274232583).

820270617 is a wasteful number, since it uses less digits than its factorization.

820270617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202263.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 820270617 is about 28640.3669145491. The cubic root of 820270617 is about 936.0931163754.

The spelling of 820270617 in words is "eight hundred twenty million, two hundred seventy thousand, six hundred seventeen".