980621 has 2 divisors, whose sum is σ = 980622. Its totient is φ = 980620.

The previous prime is 980599. The next prime is 980641. The reversal of 980621 is 126089.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 978121 + 2500 = 989^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 980621 - 2⁶ = 980557 is a 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 980621.

It is not a weakly prime, because it can be changed into another prime (980641) 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, 490310 + 490311.

It is an arithmetic number, because the mean of its divisors is an integer number (490311).

2⁹⁸⁰⁶²¹ is an apocalyptic number.

It is an amenable number.

980621 is a deficient number, since it is larger than the sum of its proper divisors (1).

980621 is an equidigital number, since it uses as much as digits as its factorization.

980621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 980621 is about 990.2630963537. The cubic root of 980621 is about 99.3498150912.

The spelling of 980621 in words is "nine hundred eighty thousand, six hundred twenty-one".