78797671 has 4 divisors (see below), whose sum is σ = 79076392. Its totient is φ = 78518952.

The previous prime is 78797657. The next prime is 78797683. The reversal of 78797671 is 17679787.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78797671 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 (78797651) 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, 138936 + ... + 139501.

It is an arithmetic number, because the mean of its divisors is an integer number (19769098).

Almost surely, 2^78797671 is an apocalyptic number.

78797671 is a deficient number, since it is larger than the sum of its proper divisors (278721).

78797671 is a wasteful number, since it uses less digits than its factorization.

78797671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278720.

The product of its digits is 1037232, while the sum is 52.

The square root of 78797671 is about 8876.8052248543. The cubic root of 78797671 is about 428.7174166831.

The spelling of 78797671 in words is "seventy-eight million, seven hundred ninety-seven thousand, six hundred seventy-one".