108648509 has 4 divisors (see below), whose sum is σ = 108698304. Its totient is φ = 108598716.

The previous prime is 108648493. The next prime is 108648557. The reversal of 108648509 is 905846801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 108648509 - 2⁴ = 108648493 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 (108644509) 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, 21467 + ... + 26040.

It is an arithmetic number, because the mean of its divisors is an integer number (27174576).

Almost surely, 2^108648509 is an apocalyptic number.

It is an amenable number.

108648509 is a deficient number, since it is larger than the sum of its proper divisors (49795).

108648509 is an equidigital number, since it uses as much as digits as its factorization.

108648509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49794.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 108648509 is about 10423.4595504564. The cubic root of 108648509 is about 477.1716028221.

The spelling of 108648509 in words is "one hundred eight million, six hundred forty-eight thousand, five hundred nine".