671357 has 2 divisors, whose sum is σ = 671358. Its totient is φ = 671356.

The previous prime is 671353. The next prime is 671369. The reversal of 671357 is 753176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606841 + 64516 = 779^2 + 254^2 .

It is a cyclic number.

It is not a de Polignac number, because 671357 - 2² = 671353 is a prime.

It is a super-5 number, since 5×671357⁵ (a number of 30 digits) contains 55555 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335678 + 335679.

It is an arithmetic number, because the mean of its divisors is an integer number (335679).

2⁶⁷¹³⁵⁷ is an apocalyptic number.

It is an amenable number.

671357 is a deficient number, since it is larger than the sum of its proper divisors (1).

671357 is an equidigital number, since it uses as much as digits as its factorization.

671357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4410, while the sum is 29.

The square root of 671357 is about 819.3637775738. The cubic root of 671357 is about 87.5624370691.

The spelling of 671357 in words is "six hundred seventy-one thousand, three hundred fifty-seven".