678495 has 8 divisors (see below), whose sum is σ = 1085616. Its totient is φ = 361856.

The previous prime is 678493. The next prime is 678499. The reversal of 678495 is 594876.

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

It is a cyclic number.

It is not a de Polignac number, because 678495 - 2¹ = 678493 is a prime.

678495 is a lucky number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678493) 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, 22602 + ... + 22631.

It is an arithmetic number, because the mean of its divisors is an integer number (135702).

2⁶⁷⁸⁴⁹⁵ is an apocalyptic number.

678495 is a deficient number, since it is larger than the sum of its proper divisors (407121).

678495 is a wasteful number, since it uses less digits than its factorization.

678495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45241.

The product of its digits is 60480, while the sum is 39.

The square root of 678495 is about 823.7080793582. The cubic root of 678495 is about 87.8716707324.

The spelling of 678495 in words is "six hundred seventy-eight thousand, four hundred ninety-five".