68945369 has 4 divisors (see below), whose sum is σ = 69656244. Its totient is φ = 68234496.

The previous prime is 68945351. The next prime is 68945377. The reversal of 68945369 is 96354986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50239744 + 18705625 = 7088^2 + 4325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68945369 is a prime.

It is a super-2 number, since 2×68945369² = 9506927813092322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68945269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355292 + ... + 355485.

It is an arithmetic number, because the mean of its divisors is an integer number (17414061).

Almost surely, 2^68945369 is an apocalyptic number.

It is an amenable number.

68945369 is a deficient number, since it is larger than the sum of its proper divisors (710875).

68945369 is an equidigital number, since it uses as much as digits as its factorization.

68945369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710874.

The product of its digits is 1399680, while the sum is 50.

The square root of 68945369 is about 8303.3348119897. The cubic root of 68945369 is about 410.0483167330.

The spelling of 68945369 in words is "sixty-eight million, nine hundred forty-five thousand, three hundred sixty-nine".