83824649 has 2 divisors, whose sum is σ = 83824650. Its totient is φ = 83824648.

The previous prime is 83824633. The next prime is 83824669. The reversal of 83824649 is 94642838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70023424 + 13801225 = 8368^2 + 3715^2 .

It is a cyclic number.

It is not a de Polignac number, because 83824649 - 2⁴ = 83824633 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (83824619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41912324 + 41912325.

It is an arithmetic number, because the mean of its divisors is an integer number (41912325).

Almost surely, 2^83824649 is an apocalyptic number.

It is an amenable number.

83824649 is a deficient number, since it is larger than the sum of its proper divisors (1).

83824649 is an equidigital number, since it uses as much as digits as its factorization.

83824649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 44.

The square root of 83824649 is about 9155.5802109970. The cubic root of 83824649 is about 437.6469584127.

It can be divided in two parts, 8382 and 4649, that added together give a palindrome (13031).

The spelling of 83824649 in words is "eighty-three million, eight hundred twenty-four thousand, six hundred forty-nine".