78042067 has 2 divisors, whose sum is σ = 78042068. Its totient is φ = 78042066.

The previous prime is 78042049. The next prime is 78042077. The reversal of 78042067 is 76024087.

It is a strong prime.

It is an emirp because it is prime and its reverse (76024087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78042067 - 2¹⁹ = 77517779 is a prime.

It is not a weakly prime, because it can be changed into another prime (78042007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39021033 + 39021034.

It is an arithmetic number, because the mean of its divisors is an integer number (39021034).

Almost surely, 2^78042067 is an apocalyptic number.

78042067 is a deficient number, since it is larger than the sum of its proper divisors (1).

78042067 is an equidigital number, since it uses as much as digits as its factorization.

78042067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 78042067 is about 8834.1421202061. The cubic root of 78042067 is about 427.3426654477.

The spelling of 78042067 in words is "seventy-eight million, forty-two thousand, sixty-seven".