68888849 has 2 divisors, whose sum is σ = 68888850. Its totient is φ = 68888848.

The previous prime is 68888843. The next prime is 68888861. The reversal of 68888849 is 94888886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57866449 + 11022400 = 7607^2 + 3320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68888849 is a prime.

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 (68888843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34444424 + 34444425.

It is an arithmetic number, because the mean of its divisors is an integer number (34444425).

Almost surely, 2^68888849 is an apocalyptic number.

It is an amenable number.

68888849 is a deficient number, since it is larger than the sum of its proper divisors (1).

68888849 is an equidigital number, since it uses as much as digits as its factorization.

68888849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7077888, while the sum is 59.

The square root of 68888849 is about 8299.9306623610. The cubic root of 68888849 is about 409.9362363659.

The spelling of 68888849 in words is "sixty-eight million, eight hundred eighty-eight thousand, eight hundred forty-nine".