108609005 has 8 divisors (see below), whose sum is σ = 137997432. Its totient is φ = 81776128.

The previous prime is 108609001. The next prime is 108609043. The reversal of 108609005 is 500906801.

It can be written as a sum of positive squares in 4 ways, for example, as 43112356 + 65496649 = 6566^2 + 8093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 108609005 - 2² = 108609001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108609001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638792 + ... + 638961.

It is an arithmetic number, because the mean of its divisors is an integer number (17249679).

Almost surely, 2^108609005 is an apocalyptic number.

It is an amenable number.

108609005 is a deficient number, since it is larger than the sum of its proper divisors (29388427).

108609005 is a wasteful number, since it uses less digits than its factorization.

108609005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277775.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 108609005 is about 10421.5644219090. The cubic root of 108609005 is about 477.1137634885.

The spelling of 108609005 in words is "one hundred eight million, six hundred nine thousand, five".