678953 has 4 divisors (see below), whose sum is σ = 740688. Its totient is φ = 617220.

The previous prime is 678949. The next prime is 678959. The reversal of 678953 is 359876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 678953 - 2² = 678949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (678959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30851 + ... + 30872.

It is an arithmetic number, because the mean of its divisors is an integer number (185172).

2⁶⁷⁸⁹⁵³ is an apocalyptic number.

It is an amenable number.

678953 is a deficient number, since it is larger than the sum of its proper divisors (61735).

678953 is a wasteful number, since it uses less digits than its factorization.

678953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61734.

The product of its digits is 45360, while the sum is 38.

The square root of 678953 is about 823.9860435711. The cubic root of 678953 is about 87.8914380965.

The spelling of 678953 in words is "six hundred seventy-eight thousand, nine hundred fifty-three".