78345067 has 2 divisors, whose sum is σ = 78345068. Its totient is φ = 78345066.

The previous prime is 78345053. The next prime is 78345073. The reversal of 78345067 is 76054387.

It is a strong prime.

It is an emirp because it is prime and its reverse (76054387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78345067 - 2⁷ = 78344939 is a prime.

It is a super-2 number, since 2×78345067² = 12275899046468978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78345017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39172533 + 39172534.

It is an arithmetic number, because the mean of its divisors is an integer number (39172534).

Almost surely, 2^78345067 is an apocalyptic number.

78345067 is a deficient number, since it is larger than the sum of its proper divisors (1).

78345067 is an equidigital number, since it uses as much as digits as its factorization.

78345067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 78345067 is about 8851.2748799255. The cubic root of 78345067 is about 427.8950069273.

The spelling of 78345067 in words is "seventy-eight million, three hundred forty-five thousand, sixty-seven".