78270067 has 2 divisors, whose sum is σ = 78270068. Its totient is φ = 78270066.

The previous prime is 78270053. The next prime is 78270097. The reversal of 78270067 is 76007287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78270067 - 2²³ = 69881459 is a prime.

It is a super-2 number, since 2×78270067² = 12252406776368978, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78270007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39135033 + 39135034.

It is an arithmetic number, because the mean of its divisors is an integer number (39135034).

Almost surely, 2^78270067 is an apocalyptic number.

78270067 is a deficient number, since it is larger than the sum of its proper divisors (1).

78270067 is an equidigital number, since it uses as much as digits as its factorization.

78270067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 78270067 is about 8847.0371876691. The cubic root of 78270067 is about 427.7584215500.

The spelling of 78270067 in words is "seventy-eight million, two hundred seventy thousand, sixty-seven".