48131309 has 4 divisors (see below), whose sum is σ = 48790716. Its totient is φ = 47471904.

The previous prime is 48131299. The next prime is 48131311. The reversal of 48131309 is 90313184.

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 36421225 + 11710084 = 6035^2 + 3422^2 .

It is a cyclic number.

It is not a de Polignac number, because 48131309 - 2⁸ = 48131053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48131399) 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, 329594 + ... + 329739.

It is an arithmetic number, because the mean of its divisors is an integer number (12197679).

Almost surely, 2^48131309 is an apocalyptic number.

It is an amenable number.

48131309 is a deficient number, since it is larger than the sum of its proper divisors (659407).

48131309 is an equidigital number, since it uses as much as digits as its factorization.

48131309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659406.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 48131309 is about 6937.6731690099. The cubic root of 48131309 is about 363.7552116808.

The spelling of 48131309 in words is "forty-eight million, one hundred thirty-one thousand, three hundred nine".