821796634 has 16 divisors (see below), whose sum is σ = 1245736800. Its totient is φ = 406571184.

The previous prime is 821796629. The next prime is 821796637. The reversal of 821796634 is 436697128.

It is not an unprimeable number, because it can be changed into a prime (821796637) 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, 80532 + ... + 90160.

It is an arithmetic number, because the mean of its divisors is an integer number (77858550).

Almost surely, 2^821796634 is an apocalyptic number.

821796634 is a deficient number, since it is larger than the sum of its proper divisors (423940166).

821796634 is a wasteful number, since it uses less digits than its factorization.

821796634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077.

The product of its digits is 435456, while the sum is 46.

The square root of 821796634 is about 28666.9955523770. The cubic root of 821796634 is about 936.6732538104.

The spelling of 821796634 in words is "eight hundred twenty-one million, seven hundred ninety-six thousand, six hundred thirty-four".