68389471 has 2 divisors, whose sum is σ = 68389472. Its totient is φ = 68389470.

The previous prime is 68389439. The next prime is 68389481. The reversal of 68389471 is 17498386.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68389471 - 2⁵ = 68389439 is a prime.

It is a super-3 number, since 3×68389471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68389411) 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 as a sum of consecutive naturals, namely, 34194735 + 34194736.

It is an arithmetic number, because the mean of its divisors is an integer number (34194736).

Almost surely, 2^68389471 is an apocalyptic number.

68389471 is a deficient number, since it is larger than the sum of its proper divisors (1).

68389471 is an equidigital number, since it uses as much as digits as its factorization.

68389471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 68389471 is about 8269.7926818029. The cubic root of 68389471 is about 408.9432851578.

The spelling of 68389471 in words is "sixty-eight million, three hundred eighty-nine thousand, four hundred seventy-one".