39821099 has 2 divisors, whose sum is σ = 39821100. Its totient is φ = 39821098.

The previous prime is 39821083. The next prime is 39821113. The reversal of 39821099 is 99012893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39821099 - 2⁴ = 39821083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39821029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19910549 + 19910550.

It is an arithmetic number, because the mean of its divisors is an integer number (19910550).

Almost surely, 2^39821099 is an apocalyptic number.

39821099 is a deficient number, since it is larger than the sum of its proper divisors (1).

39821099 is an equidigital number, since it uses as much as digits as its factorization.

39821099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 39821099 is about 6310.3961048416. The cubic root of 39821099 is about 341.4845666414.

The spelling of 39821099 in words is "thirty-nine million, eight hundred twenty-one thousand, ninety-nine".