49980005 has 4 divisors (see below), whose sum is σ = 59976012. Its totient is φ = 39984000.

The previous prime is 49980001. The next prime is 49980019. The reversal of 49980005 is 50008994.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35593156 + 14386849 = 5966^2 + 3793^2 .

It is not a de Polignac number, because 49980005 - 2² = 49980001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49980001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4997996 + ... + 4998005.

It is an arithmetic number, because the mean of its divisors is an integer number (14994003).

Almost surely, 2^49980005 is an apocalyptic number.

It is an amenable number.

49980005 is a deficient number, since it is larger than the sum of its proper divisors (9996007).

49980005 is an equidigital number, since it uses as much as digits as its factorization.

49980005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9996006.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 49980005 is about 7069.6538104776. The cubic root of 49980005 is about 368.3540351766.

Adding to 49980005 its reverse (50008994), we get a palindrome (99988999).

The spelling of 49980005 in words is "forty-nine million, nine hundred eighty thousand, five".