68905619 has 8 divisors (see below), whose sum is σ = 70489920. Its totient is φ = 67326336.

The previous prime is 68905601. The next prime is 68905621. The reversal of 68905619 is 91650986.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68905619 is a prime.

It is a super-2 number, since 2×68905619² = 9495968659546322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68905619.

It is not an unprimeable number, because it can be changed into a prime (68905019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46697 + ... + 48149.

It is an arithmetic number, because the mean of its divisors is an integer number (8811240).

Almost surely, 2^68905619 is an apocalyptic number.

68905619 is a deficient number, since it is larger than the sum of its proper divisors (1584301).

68905619 is a wasteful number, since it uses less digits than its factorization.

68905619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 68905619 is about 8300.9408502892. The cubic root of 68905619 is about 409.9694980283.

The spelling of 68905619 in words is "sixty-eight million, nine hundred five thousand, six hundred nineteen".