678429231 has 8 divisors (see below), whose sum is σ = 907839024. Its totient is φ = 450652800.

The previous prime is 678429187. The next prime is 678429233. The reversal of 678429231 is 132924876.

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

It is not a de Polignac number, because 678429231 - 2⁹ = 678428719 is a prime.

It is a super-2 number, since 2×678429231² = 920532442950502722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678429233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407370 + ... + 409031.

It is an arithmetic number, because the mean of its divisors is an integer number (113479878).

Almost surely, 2^678429231 is an apocalyptic number.

678429231 is a deficient number, since it is larger than the sum of its proper divisors (229409793).

678429231 is a wasteful number, since it uses less digits than its factorization.

678429231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816681.

The product of its digits is 145152, while the sum is 42.

The square root of 678429231 is about 26046.6740871076. The cubic root of 678429231 is about 878.6883139995.

The spelling of 678429231 in words is "six hundred seventy-eight million, four hundred twenty-nine thousand, two hundred thirty-one".