821829453 has 16 divisors (see below), whose sum is σ = 1164350016. Its totient is φ = 513826560.

The previous prime is 821829433. The next prime is 821829479. The reversal of 821829453 is 354928128.

It is not a de Polignac number, because 821829453 - 2¹⁸ = 821567309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821829403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14038 + ... + 42903.

It is an arithmetic number, because the mean of its divisors is an integer number (72771876).

Almost surely, 2^821829453 is an apocalyptic number.

It is an amenable number.

821829453 is a deficient number, since it is larger than the sum of its proper divisors (342520563).

821829453 is a wasteful number, since it uses less digits than its factorization.

821829453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57244.

The product of its digits is 138240, while the sum is 42.

The square root of 821829453 is about 28667.5679645135. The cubic root of 821829453 is about 936.6857225360.

The spelling of 821829453 in words is "eight hundred twenty-one million, eight hundred twenty-nine thousand, four hundred fifty-three".