829308920897 has 4 divisors (see below), whose sum is σ = 829311580500. Its totient is φ = 829306261296.

The previous prime is 829308920861. The next prime is 829308920929. The reversal of 829308920897 is 798029803928.

It is a Cunningham number, because it is equal to 910664²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 768630944656 + 60677976241 = 876716^2 + 246329^2 .

It is a cyclic number.

It is not a de Polignac number, because 829308920897 - 2⁶ = 829308920833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (829308920857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788678 + ... + 1510175.

It is an arithmetic number, because the mean of its divisors is an integer number (207327895125).

Almost surely, 2^829308920897 is an apocalyptic number.

It is an amenable number.

829308920897 is a deficient number, since it is larger than the sum of its proper divisors (2659603).

829308920897 is a wasteful number, since it uses less digits than its factorization.

829308920897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659602.

The product of its (nonzero) digits is 31352832, while the sum is 65.

The spelling of 829308920897 in words is "eight hundred twenty-nine billion, three hundred eight million, nine hundred twenty thousand, eight hundred ninety-seven".