39825823 has 2 divisors, whose sum is σ = 39825824. Its totient is φ = 39825822.

The previous prime is 39825791. The next prime is 39825829. The reversal of 39825823 is 32852893.

It is a strong prime.

It is an emirp because it is prime and its reverse (32852893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39825823 - 2⁵ = 39825791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39825829) 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, 19912911 + 19912912.

It is an arithmetic number, because the mean of its divisors is an integer number (19912912).

Almost surely, 2^39825823 is an apocalyptic number.

39825823 is a deficient number, since it is larger than the sum of its proper divisors (1).

39825823 is an equidigital number, since it uses as much as digits as its factorization.

39825823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 39825823 is about 6310.7703967107. The cubic root of 39825823 is about 341.4980696113.

The spelling of 39825823 in words is "thirty-nine million, eight hundred twenty-five thousand, eight hundred twenty-three".