48139009 has 4 divisors (see below), whose sum is σ = 48244804. Its totient is φ = 48033216.

The previous prime is 48138997. The next prime is 48139033. The reversal of 48139009 is 90093184.

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 45265984 + 2873025 = 6728^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 48139009 - 2¹¹ = 48136961 is a prime.

It is a super-3 number, since 3×48139009³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48139079) 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, 52212 + ... + 53125.

It is an arithmetic number, because the mean of its divisors is an integer number (12061201).

Almost surely, 2^48139009 is an apocalyptic number.

It is an amenable number.

48139009 is a deficient number, since it is larger than the sum of its proper divisors (105795).

48139009 is a wasteful number, since it uses less digits than its factorization.

48139009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105794.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 48139009 is about 6938.2280879199. The cubic root of 48139009 is about 363.7746083815.

The spelling of 48139009 in words is "forty-eight million, one hundred thirty-nine thousand, nine".