68845939 has 2 divisors, whose sum is σ = 68845940. Its totient is φ = 68845938.

The previous prime is 68845901. The next prime is 68845957. The reversal of 68845939 is 93954886.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68845939 is a prime.

It is not a weakly prime, because it can be changed into another prime (68845339) 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 as a sum of consecutive naturals, namely, 34422969 + 34422970.

It is an arithmetic number, because the mean of its divisors is an integer number (34422970).

Almost surely, 2^68845939 is an apocalyptic number.

68845939 is a deficient number, since it is larger than the sum of its proper divisors (1).

68845939 is an equidigital number, since it uses as much as digits as its factorization.

68845939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 52.

The square root of 68845939 is about 8297.3452983469. The cubic root of 68845939 is about 409.8511039742.

The spelling of 68845939 in words is "sixty-eight million, eight hundred forty-five thousand, nine hundred thirty-nine".