67979 has 2 divisors, whose sum is σ = 67980. Its totient is φ = 67978.

The previous prime is 67967. The next prime is 67987. The reversal of 67979 is 97976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67979 - 2⁸ = 67723 is a prime.

It is a super-3 number, since 3×67979³ = 942422333864217, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33989 + 33990.

It is an arithmetic number, because the mean of its divisors is an integer number (33990).

2⁶⁷⁹⁷⁹ is an apocalyptic number.

67979 is a deficient number, since it is larger than the sum of its proper divisors (1).

67979 is an equidigital number, since it uses as much as digits as its factorization.

67979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814, while the sum is 38.

The square root of 67979 is about 260.7278274370. The cubic root of 67979 is about 40.8123488828.

It can be divided in two parts, 6 and 7979, that multiplied together give a palindrome (47874).

The spelling of 67979 in words is "sixty-seven thousand, nine hundred seventy-nine".