678522831 has 16 divisors (see below), whose sum is σ = 1069593600. Its totient is φ = 374357088.

The previous prime is 678522791. The next prime is 678522841. The reversal of 678522831 is 138225876.

It is not a de Polignac number, because 678522831 - 2¹¹ = 678520783 is a prime.

It is a super-2 number, since 2×678522831² = 920786464376509122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678522841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556471 + ... + 557688.

It is an arithmetic number, because the mean of its divisors is an integer number (66849600).

Almost surely, 2^678522831 is an apocalyptic number.

678522831 is a deficient number, since it is larger than the sum of its proper divisors (391070769).

678522831 is a wasteful number, since it uses less digits than its factorization.

678522831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114198.

The product of its digits is 161280, while the sum is 42.

The square root of 678522831 is about 26048.4707996458. The cubic root of 678522831 is about 878.7287217730.

The spelling of 678522831 in words is "six hundred seventy-eight million, five hundred twenty-two thousand, eight hundred thirty-one".