78604871 has 4 divisors (see below), whose sum is σ = 81140544. Its totient is φ = 76069200.

The previous prime is 78604853. The next prime is 78604891. The reversal of 78604871 is 17840687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17840687 = 313 ⋅56999.

It is a cyclic number.

It is not a de Polignac number, because 78604871 - 2¹⁴ = 78588487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78604891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1267790 + ... + 1267851.

It is an arithmetic number, because the mean of its divisors is an integer number (20285136).

Almost surely, 2^78604871 is an apocalyptic number.

78604871 is a deficient number, since it is larger than the sum of its proper divisors (2535673).

78604871 is a wasteful number, since it uses less digits than its factorization.

78604871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535672.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 78604871 is about 8865.9388109777. The cubic root of 78604871 is about 428.3674730755.

The spelling of 78604871 in words is "seventy-eight million, six hundred four thousand, eight hundred seventy-one".