68359609 has 8 divisors (see below), whose sum is σ = 71171720. Its totient is φ = 65598336.

The previous prime is 68359597. The next prime is 68359633. The reversal of 68359609 is 90695386.

It can be written as a sum of positive squares in 4 ways, for example, as 28858384 + 39501225 = 5372^2 + 6285^2 .

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

It is not a de Polignac number, because 68359609 - 2⁷ = 68359481 is a prime.

It is a super-2 number, since 2×68359609² = 9346072285265762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68359639) 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, 9954 + ... + 15355.

It is an arithmetic number, because the mean of its divisors is an integer number (8896465).

Almost surely, 2^68359609 is an apocalyptic number.

It is an amenable number.

68359609 is a deficient number, since it is larger than the sum of its proper divisors (2812111).

68359609 is a wasteful number, since it uses less digits than its factorization.

68359609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25419.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 68359609 is about 8267.9869980546. The cubic root of 68359609 is about 408.8837553206.

The spelling of 68359609 in words is "sixty-eight million, three hundred fifty-nine thousand, six hundred nine".