678312241 has 8 divisors (see below), whose sum is σ = 695364768. Its totient is φ = 661284000.

The previous prime is 678312211. The next prime is 678312259. The reversal of 678312241 is 142213876.

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-678312241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 678312197 and 678312206.

It is not an unprimeable number, because it can be changed into a prime (678312211) 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, 59146 + ... + 69676.

It is an arithmetic number, because the mean of its divisors is an integer number (86920596).

Almost surely, 2^678312241 is an apocalyptic number.

It is an amenable number.

678312241 is a deficient number, since it is larger than the sum of its proper divisors (17052527).

678312241 is a wasteful number, since it uses less digits than its factorization.

678312241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12143.

The product of its digits is 16128, while the sum is 34.

The square root of 678312241 is about 26044.4282141114. The cubic root of 678312241 is about 878.6378033735.

The spelling of 678312241 in words is "six hundred seventy-eight million, three hundred twelve thousand, two hundred forty-one".