68648369 has 2 divisors, whose sum is σ = 68648370. Its totient is φ = 68648368.

The previous prime is 68648351. The next prime is 68648389. The reversal of 68648369 is 96384686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34869025 + 33779344 = 5905^2 + 5812^2 .

It is a cyclic number.

It is not a de Polignac number, because 68648369 - 2⁸ = 68648113 is a prime.

It is a super-2 number, since 2×68648369² = 9425197132720322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68648389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34324184 + 34324185.

It is an arithmetic number, because the mean of its divisors is an integer number (34324185).

Almost surely, 2^68648369 is an apocalyptic number.

It is an amenable number.

68648369 is a deficient number, since it is larger than the sum of its proper divisors (1).

68648369 is an equidigital number, since it uses as much as digits as its factorization.

68648369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 50.

The square root of 68648369 is about 8285.4311293982. The cubic root of 68648369 is about 409.4586728644.

The spelling of 68648369 in words is "sixty-eight million, six hundred forty-eight thousand, three hundred sixty-nine".