821247076 has 12 divisors (see below), whose sum is σ = 1547734972. Its totient is φ = 379037088.

The previous prime is 821247041. The next prime is 821247103. The reversal of 821247076 is 670742128.

821247076 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 498182400 + 323064676 = 22320^2 + 17974^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7896555 + ... + 7896658.

Almost surely, 2^821247076 is an apocalyptic number.

It is an amenable number.

821247076 is a deficient number, since it is larger than the sum of its proper divisors (726487896).

821247076 is a wasteful number, since it uses less digits than its factorization.

821247076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15793230 (or 15793228 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 821247076 is about 28657.4087453838. The cubic root of 821247076 is about 936.4644142000.

The spelling of 821247076 in words is "eight hundred twenty-one million, two hundred forty-seven thousand, seventy-six".