8491829 has 2 divisors, whose sum is σ = 8491830. Its totient is φ = 8491828.

The previous prime is 8491817. The next prime is 8491831. The reversal of 8491829 is 9281948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8421604 + 70225 = 2902^2 + 265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8491829 is a prime.

It is a super-2 number, since 2×8491829² = 144222319530482, which contains 22 as substring.

Together with 8491831, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8491429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245914 + 4245915.

It is an arithmetic number, because the mean of its divisors is an integer number (4245915).

Almost surely, 2^8491829 is an apocalyptic number.

It is an amenable number.

8491829 is a deficient number, since it is larger than the sum of its proper divisors (1).

8491829 is an equidigital number, since it uses as much as digits as its factorization.

8491829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 8491829 is about 2914.0742955525. The cubic root of 8491829 is about 204.0173396129.

The spelling of 8491829 in words is "eight million, four hundred ninety-one thousand, eight hundred twenty-nine".