68644369 has 2 divisors, whose sum is σ = 68644370. Its totient is φ = 68644368.

The previous prime is 68644357. The next prime is 68644399. The reversal of 68644369 is 96344686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66210769 + 2433600 = 8137^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 68644369 - 2⁷ = 68644241 is a prime.

It is a super-3 number, since 3×68644369³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (68644319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34322184 + 34322185.

It is an arithmetic number, because the mean of its divisors is an integer number (34322185).

Almost surely, 2^68644369 is an apocalyptic number.

It is an amenable number.

68644369 is a deficient number, since it is larger than the sum of its proper divisors (1).

68644369 is an equidigital number, since it uses as much as digits as its factorization.

68644369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 46.

The square root of 68644369 is about 8285.1897383222. The cubic root of 68644369 is about 409.4507199369.

The spelling of 68644369 in words is "sixty-eight million, six hundred forty-four thousand, three hundred sixty-nine".