68688547 has 8 divisors (see below), whose sum is σ = 69850080. Its totient is φ = 67533120.

The previous prime is 68688533. The next prime is 68688563. The reversal of 68688547 is 74588686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68688547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68688494 and 68688503.

It is not an unprimeable number, because it can be changed into a prime (68688577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24897 + ... + 27517.

It is an arithmetic number, because the mean of its divisors is an integer number (8731260).

Almost surely, 2^68688547 is an apocalyptic number.

68688547 is the 5242-nd heptagonal number.

68688547 is a deficient number, since it is larger than the sum of its proper divisors (1161533).

68688547 is a wasteful number, since it uses less digits than its factorization.

68688547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053.

The product of its digits is 2580480, while the sum is 52.

The square root of 68688547 is about 8287.8553920782. The cubic root of 68688547 is about 409.5385389139.

The spelling of 68688547 in words is "sixty-eight million, six hundred eighty-eight thousand, five hundred forty-seven".