68619289 has 2 divisors, whose sum is σ = 68619290. Its totient is φ = 68619288.

The previous prime is 68619263. The next prime is 68619311. The reversal of 68619289 is 98291686.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56250000 + 12369289 = 7500^2 + 3517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68619289 is a prime.

It is not a weakly prime, because it can be changed into another prime (68619209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34309644 + 34309645.

It is an arithmetic number, because the mean of its divisors is an integer number (34309645).

Almost surely, 2^68619289 is an apocalyptic number.

It is an amenable number.

68619289 is a deficient number, since it is larger than the sum of its proper divisors (1).

68619289 is an equidigital number, since it uses as much as digits as its factorization.

68619289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The square root of 68619289 is about 8283.6760559549. The cubic root of 68619289 is about 409.4008480387.

The spelling of 68619289 in words is "sixty-eight million, six hundred nineteen thousand, two hundred eighty-nine".