39980798009 has 2 divisors, whose sum is σ = 39980798010. Its totient is φ = 39980798008.

The previous prime is 39980797993. The next prime is 39980798017. The reversal of 39980798009 is 90089708993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26700540409 + 13280257600 = 163403^2 + 115240^2 .

It is a cyclic number.

It is not a de Polignac number, because 39980798009 - 2⁴ = 39980797993 is a prime.

It is not a weakly prime, because it can be changed into another prime (39980798909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19990399004 + 19990399005.

It is an arithmetic number, because the mean of its divisors is an integer number (19990399005).

Almost surely, 2^39980798009 is an apocalyptic number.

It is an amenable number.

39980798009 is a deficient number, since it is larger than the sum of its proper divisors (1).

39980798009 is an equidigital number, since it uses as much as digits as its factorization.

39980798009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 62.

The spelling of 39980798009 in words is "thirty-nine billion, nine hundred eighty million, seven hundred ninety-eight thousand, nine".