68685847 has 4 divisors (see below), whose sum is σ = 70147296. Its totient is φ = 67224400.

The previous prime is 68685811. The next prime is 68685907. The reversal of 68685847 is 74858686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68685847 - 2⁷ = 68685719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68685794 and 68685803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68685047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730654 + ... + 730747.

It is an arithmetic number, because the mean of its divisors is an integer number (17536824).

Almost surely, 2^68685847 is an apocalyptic number.

68685847 is a deficient number, since it is larger than the sum of its proper divisors (1461449).

68685847 is a wasteful number, since it uses less digits than its factorization.

68685847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461448.

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

The square root of 68685847 is about 8287.6925015350. The cubic root of 68685847 is about 409.5331728153.

The spelling of 68685847 in words is "sixty-eight million, six hundred eighty-five thousand, eight hundred forty-seven".