816955829 has 2 divisors, whose sum is σ = 816955830. Its totient is φ = 816955828.

The previous prime is 816955813. The next prime is 816955847. The reversal of 816955829 is 928559618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 741091729 + 75864100 = 27223^2 + 8710^2 .

It is a cyclic number.

It is not a de Polignac number, because 816955829 - 2⁴ = 816955813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816955879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408477914 + 408477915.

It is an arithmetic number, because the mean of its divisors is an integer number (408477915).

Almost surely, 2^816955829 is an apocalyptic number.

It is an amenable number.

816955829 is a deficient number, since it is larger than the sum of its proper divisors (1).

816955829 is an equidigital number, since it uses as much as digits as its factorization.

816955829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 53.

The square root of 816955829 is about 28582.4391716312. The cubic root of 816955829 is about 934.8304682762.

The spelling of 816955829 in words is "eight hundred sixteen million, nine hundred fifty-five thousand, eight hundred twenty-nine".