78968489 has 4 divisors (see below), whose sum is σ = 79079040. Its totient is φ = 78857940.

The previous prime is 78968437. The next prime is 78968509. The reversal of 78968489 is 98486987.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78968489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78962489) 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, 54197 + ... + 55634.

It is an arithmetic number, because the mean of its divisors is an integer number (19769760).

Almost surely, 2^78968489 is an apocalyptic number.

It is an amenable number.

78968489 is a deficient number, since it is larger than the sum of its proper divisors (110551).

78968489 is a wasteful number, since it uses less digits than its factorization.

78968489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110550.

The product of its digits is 6967296, while the sum is 59.

The square root of 78968489 is about 8886.4216082741. The cubic root of 78968489 is about 429.0269850428.

The spelling of 78968489 in words is "seventy-eight million, nine hundred sixty-eight thousand, four hundred eighty-nine".