820979027 has 8 divisors (see below), whose sum is σ = 896053872. Its totient is φ = 745977600.

The previous prime is 820979023. The next prime is 820979059. The reversal of 820979027 is 720979028.

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

It is a cyclic number.

It is not a de Polignac number, because 820979027 - 2² = 820979023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820979023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6503 + ... + 41039.

It is an arithmetic number, because the mean of its divisors is an integer number (112006734).

Almost surely, 2^820979027 is an apocalyptic number.

820979027 is a deficient number, since it is larger than the sum of its proper divisors (75074845).

820979027 is a wasteful number, since it uses less digits than its factorization.

820979027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36709.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 820979027 is about 28652.7315800780. The cubic root of 820979027 is about 936.3625180828.

Subtracting from 820979027 its reverse (720979028), we obtain a palindrome (99999999).

The spelling of 820979027 in words is "eight hundred twenty million, nine hundred seventy-nine thousand, twenty-seven".