821313086 has 8 divisors (see below), whose sum is σ = 1343966904. Its totient is φ = 373324120.

The previous prime is 821313083. The next prime is 821313121. The reversal of 821313086 is 680313128.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821313083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18666185 + ... + 18666228.

It is an arithmetic number, because the mean of its divisors is an integer number (167995863).

Almost surely, 2^821313086 is an apocalyptic number.

821313086 is a deficient number, since it is larger than the sum of its proper divisors (522653818).

821313086 is a wasteful number, since it uses less digits than its factorization.

821313086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37332426.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 821313086 is about 28658.5604313964. The cubic root of 821313086 is about 936.4895038316.

The spelling of 821313086 in words is "eight hundred twenty-one million, three hundred thirteen thousand, eighty-six".