67072979 has 2 divisors, whose sum is σ = 67072980. Its totient is φ = 67072978.

The previous prime is 67072961. The next prime is 67072997. The reversal of 67072979 is 97927076.

Together with next prime (67072997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (67072961) and next prime (67072997).

It is a cyclic number.

It is not a de Polignac number, because 67072979 - 2²⁰ = 66024403 is a prime.

It is not a weakly prime, because it can be changed into another prime (67072909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33536489 + 33536490.

It is an arithmetic number, because the mean of its divisors is an integer number (33536490).

Almost surely, 2^67072979 is an apocalyptic number.

67072979 is a deficient number, since it is larger than the sum of its proper divisors (1).

67072979 is an equidigital number, since it uses as much as digits as its factorization.

67072979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 333396, while the sum is 47.

The square root of 67072979 is about 8189.8094605430. The cubic root of 67072979 is about 406.3022230616.

The spelling of 67072979 in words is "sixty-seven million, seventy-two thousand, nine hundred seventy-nine".