68659919 has 4 divisors (see below), whose sum is σ = 68705520. Its totient is φ = 68614320.

The previous prime is 68659897. The next prime is 68659937. The reversal of 68659919 is 91995686.

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 68659919 - 2⁸ = 68659663 is a prime.

It is a super-2 number, since 2×68659919² = 9428368954173122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68659999) 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, 20462 + ... + 23579.

It is an arithmetic number, because the mean of its divisors is an integer number (17176380).

Almost surely, 2^68659919 is an apocalyptic number.

68659919 is a deficient number, since it is larger than the sum of its proper divisors (45601).

68659919 is a wasteful number, since it uses less digits than its factorization.

68659919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45600.

The product of its digits is 1049760, while the sum is 53.

The square root of 68659919 is about 8286.1281066612. The cubic root of 68659919 is about 409.4816352087.

The spelling of 68659919 in words is "sixty-eight million, six hundred fifty-nine thousand, nine hundred nineteen".