829308920861 has 2 divisors, whose sum is σ = 829308920862. Its totient is φ = 829308920860.

The previous prime is 829308920857. The next prime is 829308920929. The reversal of 829308920861 is 168029803928.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 582603991225 + 246704929636 = 763285^2 + 496694^2 .

It is a cyclic number.

It is not a de Polignac number, because 829308920861 - 2² = 829308920857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 829308920797 and 829308920806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (829308920851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414654460430 + 414654460431.

It is an arithmetic number, because the mean of its divisors is an integer number (414654460431).

Almost surely, 2^829308920861 is an apocalyptic number.

It is an amenable number.

829308920861 is a deficient number, since it is larger than the sum of its proper divisors (1).

829308920861 is an equidigital number, since it uses as much as digits as its factorization.

829308920861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 56.

The spelling of 829308920861 in words is "eight hundred twenty-nine billion, three hundred eight million, nine hundred twenty thousand, eight hundred sixty-one".