68842905 has 16 divisors (see below), whose sum is σ = 110344704. Its totient is φ = 36650880.

The previous prime is 68842901. The next prime is 68842927. The reversal of 68842905 is 50924886.

It is not a de Polignac number, because 68842905 - 2² = 68842901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68842901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5325 + ... + 12885.

It is an arithmetic number, because the mean of its divisors is an integer number (6896544).

Almost surely, 2^68842905 is an apocalyptic number.

It is an amenable number.

68842905 is a deficient number, since it is larger than the sum of its proper divisors (41501799).

68842905 is a wasteful number, since it uses less digits than its factorization.

68842905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8176.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 68842905 is about 8297.1624667714. The cubic root of 68842905 is about 409.8450832534.

The spelling of 68842905 in words is "sixty-eight million, eight hundred forty-two thousand, nine hundred five".