676421 has 2 divisors, whose sum is σ = 676422. Its totient is φ = 676420.

The previous prime is 676411. The next prime is 676427. The reversal of 676421 is 124676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 592900 + 83521 = 770^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 676421 - 2¹⁸ = 414277 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 676421.

It is not a weakly prime, because it can be changed into another prime (676427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338210 + 338211.

It is an arithmetic number, because the mean of its divisors is an integer number (338211).

2⁶⁷⁶⁴²¹ is an apocalyptic number.

It is an amenable number.

676421 is a deficient number, since it is larger than the sum of its proper divisors (1).

676421 is an equidigital number, since it uses as much as digits as its factorization.

676421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 676421 is about 822.4481746590. The cubic root of 676421 is about 87.7820449895.

The spelling of 676421 in words is "six hundred seventy-six thousand, four hundred twenty-one".