68571389 has 2 divisors, whose sum is σ = 68571390. Its totient is φ = 68571388.

The previous prime is 68571379. The next prime is 68571403. The reversal of 68571389 is 98317586.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60062500 + 8508889 = 7750^2 + 2917^2 .

It is a cyclic number.

It is not a de Polignac number, because 68571389 - 2²⁰ = 67522813 is a prime.

It is a super-3 number, since 3×68571389³ (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 (68571359) 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, 34285694 + 34285695.

It is an arithmetic number, because the mean of its divisors is an integer number (34285695).

Almost surely, 2^68571389 is an apocalyptic number.

It is an amenable number.

68571389 is a deficient number, since it is larger than the sum of its proper divisors (1).

68571389 is an equidigital number, since it uses as much as digits as its factorization.

68571389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 68571389 is about 8280.7843227559. The cubic root of 68571389 is about 409.3055645030.

The spelling of 68571389 in words is "sixty-eight million, five hundred seventy-one thousand, three hundred eighty-nine".