39820197983 has 2 divisors, whose sum is σ = 39820197984. Its totient is φ = 39820197982.

The previous prime is 39820197871. The next prime is 39820198009. The reversal of 39820197983 is 38979102893.

It is a strong prime.

It is an emirp because it is prime and its reverse (38979102893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39820197983 - 2³² = 35525230687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39820194983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19910098991 + 19910098992.

It is an arithmetic number, because the mean of its divisors is an integer number (19910098992).

Almost surely, 2^39820197983 is an apocalyptic number.

39820197983 is a deficient number, since it is larger than the sum of its proper divisors (1).

39820197983 is an equidigital number, since it uses as much as digits as its factorization.

39820197983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The spelling of 39820197983 in words is "thirty-nine billion, eight hundred twenty million, one hundred ninety-seven thousand, nine hundred eighty-three".