48139505 has 4 divisors (see below), whose sum is σ = 57767412. Its totient is φ = 38511600.

The previous prime is 48139501. The next prime is 48139513. The reversal of 48139505 is 50593184.

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 25633969 + 22505536 = 5063^2 + 4744^2 .

It is not a de Polignac number, because 48139505 - 2² = 48139501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (48139501) 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, 4813946 + ... + 4813955.

It is an arithmetic number, because the mean of its divisors is an integer number (14441853).

Almost surely, 2^48139505 is an apocalyptic number.

It is an amenable number.

48139505 is a deficient number, since it is larger than the sum of its proper divisors (9627907).

48139505 is an equidigital number, since it uses as much as digits as its factorization.

48139505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9627906.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 48139505 is about 6938.2638318242. The cubic root of 48139505 is about 363.7758577604.

The spelling of 48139505 in words is "forty-eight million, one hundred thirty-nine thousand, five hundred five".