821468823 has 8 divisors (see below), whose sum is σ = 1251762048. Its totient is φ = 469410744.

The previous prime is 821468807. The next prime is 821468863. The reversal of 821468823 is 328864128.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 821468823 - 2⁴ = 821468807 is a prime.

It is a super-2 number, since 2×821468823² = 1349622054322010658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821468803) 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, 19558761 + ... + 19558802.

It is an arithmetic number, because the mean of its divisors is an integer number (156470256).

Almost surely, 2^821468823 is an apocalyptic number.

821468823 is a deficient number, since it is larger than the sum of its proper divisors (430293225).

821468823 is a wasteful number, since it uses less digits than its factorization.

821468823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39117573.

The product of its digits is 147456, while the sum is 42.

The square root of 821468823 is about 28661.2774139605. The cubic root of 821468823 is about 936.5486923234.

The spelling of 821468823 in words is "eight hundred twenty-one million, four hundred sixty-eight thousand, eight hundred twenty-three".