78470671 has 4 divisors (see below), whose sum is σ = 78488632. Its totient is φ = 78452712.

The previous prime is 78470663. The next prime is 78470699. The reversal of 78470671 is 17607487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17607487 = 1193 ⋅14759.

It is a cyclic number.

It is not a de Polignac number, because 78470671 - 2³ = 78470663 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 (78470071) 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, 2281 + ... + 12733.

It is an arithmetic number, because the mean of its divisors is an integer number (19622158).

Almost surely, 2^78470671 is an apocalyptic number.

78470671 is a deficient number, since it is larger than the sum of its proper divisors (17961).

78470671 is a wasteful number, since it uses less digits than its factorization.

78470671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17960.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 78470671 is about 8858.3672874859. The cubic root of 78470671 is about 428.1235540896.

The spelling of 78470671 in words is "seventy-eight million, four hundred seventy thousand, six hundred seventy-one".