829936981 has 2 divisors, whose sum is σ = 829936982. Its totient is φ = 829936980.

The previous prime is 829936969. The next prime is 829937057. The reversal of 829936981 is 189639928.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 720922500 + 109014481 = 26850^2 + 10441^2 .

It is a cyclic number.

It is not a de Polignac number, because 829936981 - 2⁹ = 829936469 is a prime.

It is a super-2 number, since 2×829936981² = 1377590784862788722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (829934981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414968490 + 414968491.

It is an arithmetic number, because the mean of its divisors is an integer number (414968491).

Almost surely, 2^829936981 is an apocalyptic number.

It is an amenable number.

829936981 is a deficient number, since it is larger than the sum of its proper divisors (1).

829936981 is an equidigital number, since it uses as much as digits as its factorization.

829936981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 55.

The square root of 829936981 is about 28808.6268503030. The cubic root of 829936981 is about 939.7558521652.

The spelling of 829936981 in words is "eight hundred twenty-nine million, nine hundred thirty-six thousand, nine hundred eighty-one".