78075071 has 2 divisors, whose sum is σ = 78075072. Its totient is φ = 78075070.

The previous prime is 78075043. The next prime is 78075077. The reversal of 78075071 is 17057087.

It is a strong prime.

It is an emirp because it is prime and its reverse (17057087) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78075071 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78075077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39037535 + 39037536.

It is an arithmetic number, because the mean of its divisors is an integer number (39037536).

Almost surely, 2^78075071 is an apocalyptic number.

78075071 is a deficient number, since it is larger than the sum of its proper divisors (1).

78075071 is an equidigital number, since it uses as much as digits as its factorization.

78075071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13720, while the sum is 35.

The square root of 78075071 is about 8836.0099026653. The cubic root of 78075071 is about 427.4028980468.

The spelling of 78075071 in words is "seventy-eight million, seventy-five thousand, seventy-one".