78100871 has 2 divisors, whose sum is σ = 78100872. Its totient is φ = 78100870.

The previous prime is 78100831. The next prime is 78100877. The reversal of 78100871 is 17800187.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78100871 - 2⁶ = 78100807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78100877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39050435 + 39050436.

It is an arithmetic number, because the mean of its divisors is an integer number (39050436).

Almost surely, 2^78100871 is an apocalyptic number.

78100871 is a deficient number, since it is larger than the sum of its proper divisors (1).

78100871 is an equidigital number, since it uses as much as digits as its factorization.

78100871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 32.

The square root of 78100871 is about 8837.4697170627. The cubic root of 78100871 is about 427.4499714606.

The spelling of 78100871 in words is "seventy-eight million, one hundred thousand, eight hundred seventy-one".