316621 has 2 divisors, whose sum is σ = 316622. Its totient is φ = 316620.

The previous prime is 316583. The next prime is 316633. The reversal of 316621 is 126613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280900 + 35721 = 530^2 + 189^2 .

It is an emirp because it is prime and its reverse (126613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 316621 - 2⁷ = 316493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316661) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158310 + 158311.

It is an arithmetic number, because the mean of its divisors is an integer number (158311).

2³¹⁶⁶²¹ is an apocalyptic number.

It is an amenable number.

316621 is a deficient number, since it is larger than the sum of its proper divisors (1).

316621 is an equidigital number, since it uses as much as digits as its factorization.

316621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 316621 is about 562.6908565100. The cubic root of 316621 is about 68.1574351061.

The spelling of 316621 in words is "three hundred sixteen thousand, six hundred twenty-one".