48781609 has 4 divisors (see below), whose sum is σ = 48795604. Its totient is φ = 48767616.

The previous prime is 48781553. The next prime is 48781661. The reversal of 48781609 is 90618784.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 45265984 + 3515625 = 6728^2 + 1875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-48781609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48781669) 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, 2869 + ... + 10285.

It is an arithmetic number, because the mean of its divisors is an integer number (12198901).

Almost surely, 2^48781609 is an apocalyptic number.

It is an amenable number.

48781609 is a deficient number, since it is larger than the sum of its proper divisors (13995).

48781609 is an equidigital number, since it uses as much as digits as its factorization.

48781609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13994.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 48781609 is about 6984.3832225902. The cubic root of 48781609 is about 365.3861154543.

The spelling of 48781609 in words is "forty-eight million, seven hundred eighty-one thousand, six hundred nine".