678497 has 8 divisors (see below), whose sum is σ = 718080. Its totient is φ = 640080.

The previous prime is 678493. The next prime is 678499. The reversal of 678497 is 794876.

678497 = 104² + 105² + ... + 146².

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 678497 - 2² = 678493 is a prime.

It is a Duffinian 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, 1079 + ... + 1587.

It is an arithmetic number, because the mean of its divisors is an integer number (89760).

2⁶⁷⁸⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

678497 is a deficient number, since it is larger than the sum of its proper divisors (39583).

678497 is a wasteful number, since it uses less digits than its factorization.

678497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583.

The product of its digits is 84672, while the sum is 41.

The square root of 678497 is about 823.7092933796. The cubic root of 678497 is about 87.8717570721.

The spelling of 678497 in words is "six hundred seventy-eight thousand, four hundred ninety-seven".