68209619 has 4 divisors (see below), whose sum is σ = 68388096. Its totient is φ = 68031144.

The previous prime is 68209613. The next prime is 68209621. The reversal of 68209619 is 91690286.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68209619 - 2¹² = 68205523 is a prime.

It is a super-2 number, since 2×68209619² = 9305104248250322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68209613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88664 + ... + 89429.

It is an arithmetic number, because the mean of its divisors is an integer number (17097024).

Almost surely, 2^68209619 is an apocalyptic number.

68209619 is a deficient number, since it is larger than the sum of its proper divisors (178477).

68209619 is a wasteful number, since it uses less digits than its factorization.

68209619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178476.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 68209619 is about 8258.9114900209. The cubic root of 68209619 is about 408.5844880370.

The spelling of 68209619 in words is "sixty-eight million, two hundred nine thousand, six hundred nineteen".