39980419909 has 2 divisors, whose sum is σ = 39980419910. Its totient is φ = 39980419908.

The previous prime is 39980419903. The next prime is 39980419931. The reversal of 39980419909 is 90991408993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38284792225 + 1695627684 = 195665^2 + 41178^2 .

It is an emirp because it is prime and its reverse (90991408993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39980419909 - 2⁹ = 39980419397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39980419903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19990209954 + 19990209955.

It is an arithmetic number, because the mean of its divisors is an integer number (19990209955).

Almost surely, 2^39980419909 is an apocalyptic number.

It is an amenable number.

39980419909 is a deficient number, since it is larger than the sum of its proper divisors (1).

39980419909 is an equidigital number, since it uses as much as digits as its factorization.

39980419909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5668704, while the sum is 61.

The spelling of 39980419909 in words is "thirty-nine billion, nine hundred eighty million, four hundred nineteen thousand, nine hundred nine".