68761609 has 16 divisors (see below), whose sum is σ = 80317440. Its totient is φ = 57649680.

The previous prime is 68761607. The next prime is 68761619. The reversal of 68761609 is 90616786.

It is a cyclic number.

It is not a de Polignac number, because 68761609 - 2¹ = 68761607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68761607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136452 + ... + 136954.

It is an arithmetic number, because the mean of its divisors is an integer number (5019840).

Almost surely, 2^68761609 is an apocalyptic number.

It is an amenable number.

68761609 is a deficient number, since it is larger than the sum of its proper divisors (11555831).

68761609 is a wasteful number, since it uses less digits than its factorization.

68761609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 68761609 is about 8292.2619953786. The cubic root of 68761609 is about 409.6836921859.

The spelling of 68761609 in words is "sixty-eight million, seven hundred sixty-one thousand, six hundred nine".