68839919 has 8 divisors (see below), whose sum is σ = 73211760. Its totient is φ = 64503936.

The previous prime is 68839909. The next prime is 68839957. The reversal of 68839919 is 91993886.

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

It is a cyclic number.

It is not a de Polignac number, because 68839919 - 2¹⁶ = 68774383 is a prime.

It is a super-2 number, since 2×68839919² = 9477868895853122, 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 (68839909) 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, 4949 + ... + 12734.

It is an arithmetic number, because the mean of its divisors is an integer number (9151470).

Almost surely, 2^68839919 is an apocalyptic number.

68839919 is a deficient number, since it is larger than the sum of its proper divisors (4371841).

68839919 is a wasteful number, since it uses less digits than its factorization.

68839919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17929.

The product of its digits is 839808, while the sum is 53.

The square root of 68839919 is about 8296.9825237854. The cubic root of 68839919 is about 409.8391576120.

The spelling of 68839919 in words is "sixty-eight million, eight hundred thirty-nine thousand, nine hundred nineteen".