68947845 has 16 divisors (see below), whose sum is σ = 110808000. Its totient is φ = 36608384.

The previous prime is 68947831. The next prime is 68947847. The reversal of 68947845 is 54874986.

It is a cyclic number.

It is not a de Polignac number, because 68947845 - 2⁴ = 68947829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68947847) 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 15 ways as a sum of consecutive naturals, for example, 6720 + ... + 13529.

It is an arithmetic number, because the mean of its divisors is an integer number (6925500).

Almost surely, 2^68947845 is an apocalyptic number.

It is an amenable number.

68947845 is a deficient number, since it is larger than the sum of its proper divisors (41860155).

68947845 is a wasteful number, since it uses less digits than its factorization.

68947845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20484.

The product of its digits is 1935360, while the sum is 51.

The square root of 68947845 is about 8303.4839073729. The cubic root of 68947845 is about 410.0532252932.

The spelling of 68947845 in words is "sixty-eight million, nine hundred forty-seven thousand, eight hundred forty-five".