678379 has 4 divisors (see below), whose sum is σ = 730576. Its totient is φ = 626184.

The previous prime is 678371. The next prime is 678383. The reversal of 678379 is 973876.

678379 = 52² + 53² + ... + 129².

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

It is not a de Polignac number, because 678379 - 2³ = 678371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678371) 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, 26079 + ... + 26104.

It is an arithmetic number, because the mean of its divisors is an integer number (182644).

2⁶⁷⁸³⁷⁹ is an apocalyptic number.

678379 is a deficient number, since it is larger than the sum of its proper divisors (52197).

678379 is a wasteful number, since it uses less digits than its factorization.

678379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52196.

The product of its digits is 63504, while the sum is 40.

The square root of 678379 is about 823.6376630534. The cubic root of 678379 is about 87.8666627394.

The spelling of 678379 in words is "six hundred seventy-eight thousand, three hundred seventy-nine".