78073871 has 2 divisors, whose sum is σ = 78073872. Its totient is φ = 78073870.

The previous prime is 78073859. The next prime is 78073889. The reversal of 78073871 is 17837087.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78073871 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 (78073271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39036935 + 39036936.

It is an arithmetic number, because the mean of its divisors is an integer number (39036936).

Almost surely, 2^78073871 is an apocalyptic number.

78073871 is a deficient number, since it is larger than the sum of its proper divisors (1).

78073871 is an equidigital number, since it uses as much as digits as its factorization.

78073871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 78073871 is about 8835.9419984516. The cubic root of 78073871 is about 427.4007083333.

The spelling of 78073871 in words is "seventy-eight million, seventy-three thousand, eight hundred seventy-one".