678091 has 8 divisors (see below), whose sum is σ = 723600. Its totient is φ = 633600.

The previous prime is 678077. The next prime is 678101. The reversal of 678091 is 190876.

678091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 678091 - 2¹¹ = 676043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678061) 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, 1491 + ... + 1891.

It is an arithmetic number, because the mean of its divisors is an integer number (90450).

2⁶⁷⁸⁰⁹¹ is an apocalyptic number.

678091 is a deficient number, since it is larger than the sum of its proper divisors (45509).

678091 is a wasteful number, since it uses less digits than its factorization.

678091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 678091 is about 823.4628103321. The cubic root of 678091 is about 87.8542266327.

The spelling of 678091 in words is "six hundred seventy-eight thousand, ninety-one".