821268877 has 8 divisors (see below), whose sum is σ = 964847520. Its totient is φ = 689176560.

The previous prime is 821268853. The next prime is 821268881. The reversal of 821268877 is 778862128.

821268877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 821268877 - 2¹¹ = 821266829 is a prime.

It is a super-2 number, since 2×821268877² = 1348965136657682258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 821268877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821268677) 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, 2871427 + ... + 2871712.

It is an arithmetic number, because the mean of its divisors is an integer number (120605940).

Almost surely, 2^821268877 is an apocalyptic number.

It is an amenable number.

821268877 is a deficient number, since it is larger than the sum of its proper divisors (143578643).

821268877 is a wasteful number, since it uses less digits than its factorization.

821268877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5743163.

The product of its digits is 602112, while the sum is 49.

The square root of 821268877 is about 28657.7891157012. The cubic root of 821268877 is about 936.4727006547.

The spelling of 821268877 in words is "eight hundred twenty-one million, two hundred sixty-eight thousand, eight hundred seventy-seven".