821117713 has 8 divisors (see below), whose sum is σ = 884520000. Its totient is φ = 757749648.

The previous prime is 821117681. The next prime is 821117719. The reversal of 821117713 is 317711128.

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 821117713 - 2⁵ = 821117681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (821117719) 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, 64338 + ... + 76036.

It is an arithmetic number, because the mean of its divisors is an integer number (110565000).

Almost surely, 2^821117713 is an apocalyptic number.

It is an amenable number.

821117713 is a deficient number, since it is larger than the sum of its proper divisors (63402287).

821117713 is a wasteful number, since it uses less digits than its factorization.

821117713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17111.

The product of its digits is 2352, while the sum is 31.

The square root of 821117713 is about 28655.1515961790. The cubic root of 821117713 is about 936.4152409321.

The spelling of 821117713 in words is "eight hundred twenty-one million, one hundred seventeen thousand, seven hundred thirteen".