67979959 has 2 divisors, whose sum is σ = 67979960. Its totient is φ = 67979958.

The previous prime is 67979953. The next prime is 67979963. The reversal of 67979959 is 95997976.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67979959 is a prime.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 67979897 and 67979906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67979953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33989979 + 33989980.

It is an arithmetic number, because the mean of its divisors is an integer number (33989980).

Almost surely, 2^67979959 is an apocalyptic number.

67979959 is a deficient number, since it is larger than the sum of its proper divisors (1).

67979959 is an equidigital number, since it uses as much as digits as its factorization.

67979959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9644670, while the sum is 61.

The square root of 67979959 is about 8244.9959975733. The cubic root of 67979959 is about 408.1254079921.

The spelling of 67979959 in words is "sixty-seven million, nine hundred seventy-nine thousand, nine hundred fifty-nine".