78671967 has 8 divisors (see below), whose sum is σ = 114432000. Its totient is φ = 47679960.

The previous prime is 78671959. The next prime is 78671969. The reversal of 78671967 is 76917687.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78671967 - 2³ = 78671959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78671969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1191967 + ... + 1192032.

It is an arithmetic number, because the mean of its divisors is an integer number (14304000).

Almost surely, 2^78671967 is an apocalyptic number.

78671967 is a deficient number, since it is larger than the sum of its proper divisors (35760033).

78671967 is a wasteful number, since it uses less digits than its factorization.

78671967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384013.

The product of its digits is 889056, while the sum is 51.

The square root of 78671967 is about 8869.7219234878. The cubic root of 78671967 is about 428.4893212071.

The spelling of 78671967 in words is "seventy-eight million, six hundred seventy-one thousand, nine hundred sixty-seven".