820971074 has 16 divisors (see below), whose sum is σ = 1535322816. Its totient is φ = 319858800.

The previous prime is 820971071. The next prime is 820971091. The reversal of 820971074 is 470179028.

It is not an unprimeable number, because it can be changed into a prime (820971071) 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, 2665337 + ... + 2665644.

It is an arithmetic number, because the mean of its divisors is an integer number (95957676).

Almost surely, 2^820971074 is an apocalyptic number.

820971074 is a deficient number, since it is larger than the sum of its proper divisors (714351742).

820971074 is a wasteful number, since it uses less digits than its factorization.

820971074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5331001.

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

The square root of 820971074 is about 28652.5927971624. The cubic root of 820971074 is about 936.3594944915.

The spelling of 820971074 in words is "eight hundred twenty million, nine hundred seventy-one thousand, seventy-four".