68120989 has 8 divisors (see below), whose sum is σ = 73042560. Its totient is φ = 63301056.

The previous prime is 68120939. The next prime is 68121013. The reversal of 68120989 is 98902186.

It is a happy number.

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 68120989 - 2⁷ = 68120861 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 (68120939) 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, 24019 + ... + 26704.

It is an arithmetic number, because the mean of its divisors is an integer number (9130320).

Almost surely, 2^68120989 is an apocalyptic number.

It is an amenable number.

68120989 is a deficient number, since it is larger than the sum of its proper divisors (4921571).

68120989 is a wasteful number, since it uses less digits than its factorization.

68120989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50819.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 68120989 is about 8253.5440266591. The cubic root of 68120989 is about 408.4074429235.

The spelling of 68120989 in words is "sixty-eight million, one hundred twenty thousand, nine hundred eighty-nine".