39980419979 has 4 divisors (see below), whose sum is σ = 39982123560. Its totient is φ = 39978716400.

The previous prime is 39980419939. The next prime is 39980420009. The reversal of 39980419979 is 97991408993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39980419979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39980419909) 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 in 3 ways as a sum of consecutive naturals, for example, 816089 + ... + 863690.

It is an arithmetic number, because the mean of its divisors is an integer number (9995530890).

Almost surely, 2^39980419979 is an apocalyptic number.

39980419979 is a deficient number, since it is larger than the sum of its proper divisors (1703581).

39980419979 is a wasteful number, since it uses less digits than its factorization.

39980419979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703580.

The product of its (nonzero) digits is 39680928, while the sum is 68.

The spelling of 39980419979 in words is "thirty-nine billion, nine hundred eighty million, four hundred nineteen thousand, nine hundred seventy-nine".