68784147 has 40 divisors (see below), whose sum is σ = 107593200. Its totient is φ = 43747776.

The previous prime is 68784139. The next prime is 68784169. The reversal of 68784147 is 74148786.

It is not a de Polignac number, because 68784147 - 2³ = 68784139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68784137) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 176629 + ... + 177017.

It is an arithmetic number, because the mean of its divisors is an integer number (2689830).

Almost surely, 2^68784147 is an apocalyptic number.

68784147 is a deficient number, since it is larger than the sum of its proper divisors (38809053).

68784147 is a wasteful number, since it uses less digits than its factorization.

68784147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 488 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 68784147 is about 8293.6208618432. The cubic root of 68784147 is about 409.7284479858.

It can be divided in two parts, 6878 and 4147, that added together give a square (11025 = 105²).

The spelling of 68784147 in words is "sixty-eight million, seven hundred eighty-four thousand, one hundred forty-seven".