68979859 has 4 divisors (see below), whose sum is σ = 74286016. Its totient is φ = 63673704.

The previous prime is 68979853. The next prime is 68979907. The reversal of 68979859 is 95897986.

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 68979859 - 2⁷ = 68979731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68979797 and 68979806.

It is not an unprimeable number, because it can be changed into a prime (68979853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2653059 + ... + 2653084.

It is an arithmetic number, because the mean of its divisors is an integer number (18571504).

Almost surely, 2^68979859 is an apocalyptic number.

68979859 is a deficient number, since it is larger than the sum of its proper divisors (5306157).

68979859 is a wasteful number, since it uses less digits than its factorization.

68979859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306156.

The product of its digits is 9797760, while the sum is 61.

The square root of 68979859 is about 8305.4114287012. The cubic root of 68979859 is about 410.1166810482.

The spelling of 68979859 in words is "sixty-eight million, nine hundred seventy-nine thousand, eight hundred fifty-nine".