823829897 has 4 divisors (see below), whose sum is σ = 898723536. Its totient is φ = 748936260.

The previous prime is 823829891. The next prime is 823829971. The reversal of 823829897 is 798928328.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 823829897 - 2⁶ = 823829833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (823829891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37446803 + ... + 37446824.

It is an arithmetic number, because the mean of its divisors is an integer number (224680884).

Almost surely, 2^823829897 is an apocalyptic number.

It is an amenable number.

823829897 is a deficient number, since it is larger than the sum of its proper divisors (74893639).

823829897 is a wasteful number, since it uses less digits than its factorization.

823829897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74893638.

The product of its digits is 3483648, while the sum is 56.

The square root of 823829897 is about 28702.4371264881. The cubic root of 823829897 is about 937.4451132785.

The spelling of 823829897 in words is "eight hundred twenty-three million, eight hundred twenty-nine thousand, eight hundred ninety-seven".