39998393 has 2 divisors, whose sum is σ = 39998394. Its totient is φ = 39998392.

The previous prime is 39998389. The next prime is 39998423. The reversal of 39998393 is 39389993.

39998393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30063289 + 9935104 = 5483^2 + 3152^2 .

It is a cyclic number.

It is not a de Polignac number, because 39998393 - 2² = 39998389 is a prime.

It is not a weakly prime, because it can be changed into another prime (39998293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19999196 + 19999197.

It is an arithmetic number, because the mean of its divisors is an integer number (19999197).

Almost surely, 2^39998393 is an apocalyptic number.

It is an amenable number.

39998393 is a deficient number, since it is larger than the sum of its proper divisors (1).

39998393 is an equidigital number, since it uses as much as digits as its factorization.

39998393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1417176, while the sum is 53.

The square root of 39998393 is about 6324.4282745557. The cubic root of 39998393 is about 341.9906093884.

Subtracting from 39998393 its reverse (39389993), we obtain a square (608400 = 780²).

The spelling of 39998393 in words is "thirty-nine million, nine hundred ninety-eight thousand, three hundred ninety-three".