68746979 has 4 divisors (see below), whose sum is σ = 78567984. Its totient is φ = 58925976.

The previous prime is 68746949. The next prime is 68746987. The reversal of 68746979 is 97964786.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68746979 is a prime.

It is a super-2 number, since 2×68746979² = 9452294243252882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68746949) 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, 4910492 + ... + 4910505.

It is an arithmetic number, because the mean of its divisors is an integer number (19641996).

Almost surely, 2^68746979 is an apocalyptic number.

68746979 is a deficient number, since it is larger than the sum of its proper divisors (9821005).

68746979 is an equidigital number, since it uses as much as digits as its factorization.

68746979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9821004.

The product of its digits is 4572288, while the sum is 56.

The square root of 68746979 is about 8291.3798007328. The cubic root of 68746979 is about 409.6546348014.

The spelling of 68746979 in words is "sixty-eight million, seven hundred forty-six thousand, nine hundred seventy-nine".