68510389 has 2 divisors, whose sum is σ = 68510390. Its totient is φ = 68510388.

The previous prime is 68510359. The next prime is 68510417. The reversal of 68510389 is 98301586.

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., 49238289 + 19272100 = 7017^2 + 4390^2 .

It is a cyclic number.

It is not a de Polignac number, because 68510389 - 2¹⁷ = 68379317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68510359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34255194 + 34255195.

It is an arithmetic number, because the mean of its divisors is an integer number (34255195).

Almost surely, 2^68510389 is an apocalyptic number.

It is an amenable number.

68510389 is a deficient number, since it is larger than the sum of its proper divisors (1).

68510389 is an equidigital number, since it uses as much as digits as its factorization.

68510389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 68510389 is about 8277.1002772710. The cubic root of 68510389 is about 409.1841579560.

The spelling of 68510389 in words is "sixty-eight million, five hundred ten thousand, three hundred eighty-nine".