821484653 has 8 divisors (see below), whose sum is σ = 927067680. Its totient is φ = 721052080.

The previous prime is 821484647. The next prime is 821484691. The reversal of 821484653 is 356484128.

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 821484653 - 2²⁸ = 553049197 is a prime.

It is a super-2 number, since 2×821484653² = 1349674070229060818, 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 821484653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821484613) 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, 1287275 + ... + 1287912.

It is an arithmetic number, because the mean of its divisors is an integer number (115883460).

Almost surely, 2^821484653 is an apocalyptic number.

It is an amenable number.

821484653 is a deficient number, since it is larger than the sum of its proper divisors (105583027).

821484653 is a wasteful number, since it uses less digits than its factorization.

821484653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575227.

The product of its digits is 184320, while the sum is 41.

The square root of 821484653 is about 28661.5535691979. The cubic root of 821484653 is about 936.5547081615.

The spelling of 821484653 in words is "eight hundred twenty-one million, four hundred eighty-four thousand, six hundred fifty-three".