68780047 has 8 divisors (see below), whose sum is σ = 79127552. Its totient is φ = 58563000.

The previous prime is 68780009. The next prime is 68780053. The reversal of 68780047 is 74008786.

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

It is a cyclic number.

It is not a de Polignac number, because 68780047 - 2²³ = 60391439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68779991 and 68780009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68580047) 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, 31479 + ... + 33592.

It is an arithmetic number, because the mean of its divisors is an integer number (9890944).

Almost surely, 2^68780047 is an apocalyptic number.

68780047 is a deficient number, since it is larger than the sum of its proper divisors (10347505).

68780047 is a wasteful number, since it uses less digits than its factorization.

68780047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65229.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 68780047 is about 8293.3736802341. The cubic root of 68780047 is about 409.7203069625.

The spelling of 68780047 in words is "sixty-eight million, seven hundred eighty thousand, forty-seven".