68605009 has 4 divisors (see below), whose sum is σ = 74841840. Its totient is φ = 62368180.

The previous prime is 68605001. The next prime is 68605037. The reversal of 68605009 is 90050686.

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 68605009 - 2³ = 68605001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68605001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3118399 + ... + 3118420.

It is an arithmetic number, because the mean of its divisors is an integer number (18710460).

Almost surely, 2^68605009 is an apocalyptic number.

It is an amenable number.

68605009 is a deficient number, since it is larger than the sum of its proper divisors (6236831).

68605009 is a wasteful number, since it uses less digits than its factorization.

68605009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236830.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 68605009 is about 8282.8140749385. The cubic root of 68605009 is about 409.3724466480.

The spelling of 68605009 in words is "sixty-eight million, six hundred five thousand, nine".