679381 has 2 divisors, whose sum is σ = 679382. Its totient is φ = 679380.

The previous prime is 679373. The next prime is 679403. The reversal of 679381 is 183976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538756 + 140625 = 734^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 679381 - 2³ = 679373 is a prime.

It is a super-2 number, since 2×679381² = 923117086322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339690 + 339691.

It is an arithmetic number, because the mean of its divisors is an integer number (339691).

2⁶⁷⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

679381 is a deficient number, since it is larger than the sum of its proper divisors (1).

679381 is an equidigital number, since it uses as much as digits as its factorization.

679381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 679381 is about 824.2457157911. The cubic root of 679381 is about 87.9099026214.

The spelling of 679381 in words is "six hundred seventy-nine thousand, three hundred eighty-one".