68951389 has 8 divisors (see below), whose sum is σ = 74755800. Its totient is φ = 63218496.

The previous prime is 68951369. The next prime is 68951413. The reversal of 68951389 is 98315986.

It can be written as a sum of positive squares in 4 ways, for example, as 4020025 + 64931364 = 2005^2 + 8058^2 .

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 68951389 - 2¹¹ = 68949341 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 (68951369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15862 + ... + 19735.

It is an arithmetic number, because the mean of its divisors is an integer number (9344475).

Almost surely, 2^68951389 is an apocalyptic number.

It is an amenable number.

68951389 is a deficient number, since it is larger than the sum of its proper divisors (5804411).

68951389 is a wasteful number, since it uses less digits than its factorization.

68951389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35759.

The product of its digits is 466560, while the sum is 49.

The square root of 68951389 is about 8303.6973090305. The cubic root of 68951389 is about 410.0602509115.

The spelling of 68951389 in words is "sixty-eight million, nine hundred fifty-one thousand, three hundred eighty-nine".