78968971 has 8 divisors (see below), whose sum is σ = 80172000. Its totient is φ = 77774400.

The previous prime is 78968951. The next prime is 78968999. The reversal of 78968971 is 17986987.

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

It is a cyclic number.

It is not a de Polignac number, because 78968971 - 2²⁵ = 45414539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78968951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18135 + ... + 22063.

It is an arithmetic number, because the mean of its divisors is an integer number (10021500).

Almost surely, 2^78968971 is an apocalyptic number.

78968971 is a deficient number, since it is larger than the sum of its proper divisors (1203029).

78968971 is a wasteful number, since it uses less digits than its factorization.

78968971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4229.

The product of its digits is 1524096, while the sum is 55.

The square root of 78968971 is about 8886.4487282604. The cubic root of 78968971 is about 429.0278579251.

The spelling of 78968971 in words is "seventy-eight million, nine hundred sixty-eight thousand, nine hundred seventy-one".