68178489 has 4 divisors (see below), whose sum is σ = 90904656. Its totient is φ = 45452324.

The previous prime is 68178469. The next prime is 68178491. The reversal of 68178489 is 98487186.

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-68178489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68178469) 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, 11363079 + ... + 11363084.

It is an arithmetic number, because the mean of its divisors is an integer number (22726164).

Almost surely, 2^68178489 is an apocalyptic number.

It is an amenable number.

68178489 is a deficient number, since it is larger than the sum of its proper divisors (22726167).

68178489 is a wasteful number, since it uses less digits than its factorization.

68178489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22726166.

The product of its digits is 774144, while the sum is 51.

The square root of 68178489 is about 8257.0266440166. The cubic root of 68178489 is about 408.5223209959.

The spelling of 68178489 in words is "sixty-eight million, one hundred seventy-eight thousand, four hundred eighty-nine".