678079 has 4 divisors (see below), whose sum is σ = 717984. Its totient is φ = 638176.

The previous prime is 678077. The next prime is 678101. The reversal of 678079 is 970876.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 678079 - 2¹ = 678077 is a prime.

It is a super-2 number, since 2×678079² = 919582260482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678077) 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, 19927 + ... + 19960.

It is an arithmetic number, because the mean of its divisors is an integer number (179496).

2⁶⁷⁸⁰⁷⁹ is an apocalyptic number.

678079 is a deficient number, since it is larger than the sum of its proper divisors (39905).

678079 is a wasteful number, since it uses less digits than its factorization.

678079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39904.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 678079 is about 823.4555239963. The cubic root of 678079 is about 87.8537083852.

It can be divided in two parts, 6780 and 79, that added together give a cube (6859 = 19³).

The spelling of 678079 in words is "six hundred seventy-eight thousand, seventy-nine".