68144569 has 2 divisors, whose sum is σ = 68144570. Its totient is φ = 68144568.

The previous prime is 68144567. The next prime is 68144581. The reversal of 68144569 is 96544186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63361600 + 4782969 = 7960^2 + 2187^2 .

It is a cyclic number.

It is not a de Polignac number, because 68144569 - 2¹ = 68144567 is a prime.

It is a super-2 number, since 2×68144569² = 9287364568391522, which contains 22 as substring.

Together with 68144567, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68144567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34072284 + 34072285.

It is an arithmetic number, because the mean of its divisors is an integer number (34072285).

Almost surely, 2^68144569 is an apocalyptic number.

It is an amenable number.

68144569 is a deficient number, since it is larger than the sum of its proper divisors (1).

68144569 is an equidigital number, since it uses as much as digits as its factorization.

68144569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 68144569 is about 8254.9723803293. The cubic root of 68144569 is about 408.4545607389.

The spelling of 68144569 in words is "sixty-eight million, one hundred forty-four thousand, five hundred sixty-nine".