78973871 has 4 divisors (see below), whose sum is σ = 78993000. Its totient is φ = 78954744.

The previous prime is 78973859. The next prime is 78973907. The reversal of 78973871 is 17837987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17837987 = 29 ⋅615103.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78973871 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 (78978871) 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, 521 + ... + 12578.

It is an arithmetic number, because the mean of its divisors is an integer number (19748250).

Almost surely, 2^78973871 is an apocalyptic number.

78973871 is a deficient number, since it is larger than the sum of its proper divisors (19129).

78973871 is a wasteful number, since it uses less digits than its factorization.

78973871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19128.

The product of its digits is 592704, while the sum is 50.

The square root of 78973871 is about 8886.7244246685. The cubic root of 78973871 is about 429.0367314231.

The spelling of 78973871 in words is "seventy-eight million, nine hundred seventy-three thousand, eight hundred seventy-one".