678590217 has 40 divisors (see below), whose sum is σ = 1066348800. Its totient is φ = 429455520.

The previous prime is 678590203. The next prime is 678590257. The reversal of 678590217 is 712095876.

It is not a de Polignac number, because 678590217 - 2¹⁶ = 678524681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678590257) 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, 130534 + ... + 135632.

It is an arithmetic number, because the mean of its divisors is an integer number (26658720).

Almost surely, 2^678590217 is an apocalyptic number.

It is an amenable number.

678590217 is a deficient number, since it is larger than the sum of its proper divisors (387758583).

678590217 is a wasteful number, since it uses less digits than its factorization.

678590217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195 (or 5186 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 678590217 is about 26049.7642407758. The cubic root of 678590217 is about 878.7578104790.

The spelling of 678590217 in words is "six hundred seventy-eight million, five hundred ninety thousand, two hundred seventeen".