678421131 has 8 divisors (see below), whose sum is σ = 905734800. Its totient is φ = 451694112.

The previous prime is 678421069. The next prime is 678421189. The reversal of 678421131 is 131124876.

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

It is not a de Polignac number, because 678421131 - 2⁶ = 678421067 is a prime.

It is a super-2 number, since 2×678421131² = 920510461974638322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 678421092 and 678421101.

It is not an unprimeable number, because it can be changed into a prime (678421031) 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, 143956 + ... + 148593.

It is an arithmetic number, because the mean of its divisors is an integer number (113216850).

Almost surely, 2^678421131 is an apocalyptic number.

678421131 is a deficient number, since it is larger than the sum of its proper divisors (227313669).

678421131 is a wasteful number, since it uses less digits than its factorization.

678421131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293325.

The product of its digits is 8064, while the sum is 33.

The square root of 678421131 is about 26046.5185965418. The cubic root of 678421131 is about 878.6848169982.

The spelling of 678421131 in words is "six hundred seventy-eight million, four hundred twenty-one thousand, one hundred thirty-one".